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Dream Source Studio 9:18pm, 2 October 2014
UPDATE March 27, 2015:

GLORY HALLELUYAH!!! :D Good news! Kurt's Camera Repair in San Diego fixed my Nikon 300mm f/4D IF-ED AF-S!!! I just tried it and it works both with and without a TC, without hesitation, super sharp. :D Guess who's going to the wetlands today!!! :D

They re-chipped the lens, which now makes it compatible with the D750 + 1.4TC II. They did this for just under $300.00. I'm extremely happy right now. I finally have my favorite combo back. Yay! :D

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UPDATE: March 18, 2015:

Today I sent my Nikon 300mm f/4D IF-ED AF-S to Kurt's Camera Repair in San Diego. They said they were willing to fix it for me by re-chipping it (according to Nikon's memo). It is supposed to arrive at their door tomorrow, so we'll see how this turns out. Hopefully they'll be able to fix it and do so for under $400.00.

I considered selling it and buying a Tamron 150-600mm, but now I think I'll keep this one and buy the Tamron 150-600 as well. This 300mm f/4D is just too sweet to let go and I'm sure I'll still find plenty of use for it even when I have a longer lens to play with.

One other thing..... the lens started having issues with AF even without the TC. That really worries me. I'll update as soon as I have more info. Wish me luck!
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UPDATE: November 7, 2014:

There's light at the end of the tunnel after all! Thanks to beachwalker2008 and the links he pointed me to, I was able to contact a local Nikon certified camera repair shop that is not only willing to work on gray market equipment, but has also figured out what's wrong with the lens. This is what they told me:

"We found a Nikon technical memo explaining this problem and the procedure for modifying the lens. This tech memo has been out for a while but a revision to it was made this week. The modification consists of replacing the DC/DC converter circuit board in the lens with a newly modified one."

What I gathered from the links is that some of the older copies of certain Nikon lenses have not gone through this modification process, but some of the newer copies have been modified by Nikon before being sent out to be sold in stores. This would explain why some U.S. versions of this lens also fail to work with the 1.4TC on certain cameras.

I'm going to drop the lens off (or mail it to Kurt's Camera Repair in San Diego) when I can. From the quick guesstimate they gave me, it should cost around $198.00 for labor and $75.00 for the new circuit.

So... I'm now much happier knowing what the problem is, that there is a fix for it and that someone qualified is willing to help me out with it.

(By the way.... there's still the mystery of one of you exchanging your D750 for another body and solving your 300mm /f4D + 1.4TC problem. I don't know how that fits into the puzzle. I'll update this thread once my lens has been modified. Hopefully it will be a success and won't cost me an arm and a leg.)

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UPDATE: November 4, 2014:

Sad news for me. The third Nikon D750 body also does not work with my Nikon 300mm f/4D ED-IF + Nikon 1.4TC II. Works great with the lens without the TC attached, but it will not focus when my TC is attached.

I rented a 300mm f/4D just like mine along with a Nikon 1.7TC II. I got to test it with my second D750 and my third D750. Both these D750 bodies worked with the rented lens, my 1.4TC and the rented 1.7TC.

I really don't understand this at all. I don't understand how my lens works great on my D750 without the TC, I don't understand how my lens works great with the TC on my D610, but how it does not focus on the D750 when both lens and TC are attached. It makes no sense to me and I wish someone could explain it to me.

I tried comparing the mount on my lens to the rented lens and I saw no difference except that mine has a small black screw in the mount, which is silver on the rented lens. The shape, depth and size are all identical.

My next step is to either find a repair shop that can take a look at the lens + TC combo to see if there's anything about it that would make it not work with the D750, or I could sell the lens (which I really don't want to do since I know how sharp and fast my copy is) and replace it with a U.S. version that may or may not work with the D750 + 1.4TC. I'm very annoyed.

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UPDATE: Oct 30, 2014:

I just received an e-mail from Nikon service in Los Angeles, saying my camera is being shipped back to me overnight. Two days ago it was on a parts hold and today it is being sent back. No word yet on whether it was fixed or not or why it was on parts hold. I'm pretty confused, but I guess I should be finding out by the end of today if anything has changed. It's out for delivery right now. That means it had to have been shipped yesterday, not today. Hmm.

New update as of 10 minutes ago. I e-mailed Nikon to find out if it has been fixed. This is the e-mail I received:

"Per our service records, No problems were found with your D750 and TC-14E II , no repairs were made. Both the camera and teleconverter received a General Clean & Check to ensure they were operating factory specifications."

So they kept my D750 for nearly three weeks without doing any kind of repairs.
>:-( This means war.

I have just rented a "legitimate" Nikon 300mm f/4D ED-IF AF-S from BorrowLenses.com for a period of three days. I will receive the lens on Monday and I will try it with the D750 + Nikon 1.4TC II. If this combo works with the rented lens, I'll take back all my BS. If this rental lens doesn't work with the D750 + 1.4TC, I'm going to drive down to Nikon in L.A., bring both my lens and the rental lens, and I will personally demonstrate what's happening. I'll have to take a day off work with no pay in order to do it, but I have no other choice since Nikon L.A. is not open on the weekends.

I have also rented the Nikon TC 17E II, so I will try the rented TC to see if it works with my lens and the D750 or not, plus I've always been curious about it anyway so I'm killing two birds with one stone. I'll update next week.

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UPDATE: Oct. 28, 2014:

On Friday I contacted Nikon through their service website to see what was going on with the camera. I was told by the service rep. that service found nothing wrong with my D750 or the TC, and they would be shipping it back to me on Monday without any repairs having been performed. He said they couldn't find any fault with it. I explained to them once more that the only way they'd find something wrong with it is if they tested it with a 300mm f/4D. I asked if they had done that. The rep told me they used their own testing methods.He did not confirm that they used the same lens, so I said something to the effect of; "If you return the camera and TC to me, I test it with a U.S. version legitimate 300mm f/4D and it doesn't work, you guys are going to hear from me".

So, today I'm waiting for my D750 to show up and it's not arriving. I check to see if there is a tracking number available for UPS, but Nikon has not provided one. I wrote them a short e-mail asking them to send me the UPS tracking number. The service rep writes back and says; "Even though I stated the Camera and teleconverter would start to be shipped back to you on Monday, Oct 27, 2014, Service has placed a parts hold on your D750. I am investigating the issue for you to learn when your camera will complete service."

O.K. so... is the camera faulty or isn't it? If they're not sending it back and if it's been placed on parts hold, does that mean they DID find something wrong with it and will be fixing it? I'm so confused at this point. We'll see!

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UPDATE: Oct. 24, 2014:

Nine days later, D750 is still at Nikon service. What's worse, they sent my 300mm f/4D ED-IF AF-S lens back to me after I repeatedly asked them (through their Nikon USA Service website AND over the phone) to keep it so that they can test it with the body and TC. They even confirmed with me via e-mail that they would keep the lens for testing with the body and now here I am, holding it in my hands when it should be at the service center with the D750 and TC. Ughhhh..... Nikon.... WTF?! Talk about a serious communication issue.


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UPDATE: Oct. 15, 2014:

Update: I received my second (replacement) copy of the D750 from Amazon. It did not work with the lens + TC combo either and exhibited the same flickering of the LCD with no AF, so I sent my D750 + TC 14E II + 300mm f/4D ED-IF AF-S to Nikon service. I just received my service order numbers (two of them, one for the camera and one for the TC). The service rank states "B2" for both items. Usually this means "major parts replaced" as far as I remember from my previous Nikon service experiences. I called to see if anyone could tell me what is being fixed or replaced, but I guess it's too early for anyone to tell me anything. I'll post another update once I find out.

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I just received a response from Nikon Service about this issue. Here's what the rep had to say:

"Hello Jana,

Since the TC-14E II is supported for use with the D750 along with that lens, I have to suggest sending the camera, teleconverter and the AF-S 300mm f/4D to our service facility for evaluation.
I have tested this setup and do not see an issue and it is supposed to work, so we will need a closer look."

Today I returned the D750 to Amazon and am expecting the replacement to get here on Wednesday. If the replacement D750 exhibits this same issue as my last copy, I will send the body, lens and TC to Nikon so they can have a look. Keep your fingers crossed that this time they work together! I'd hate to have to send all three items to Nikon.

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Yay, I'm one of the lucky ones again! I just received my D750. The first thing I did is set up my menus and settings. I attached my 300mm f/4D AF-S with the Nikon 1.4 TC II, tried to focus... and........ nada, nothing, zip, zilch..... you get the point.

So... like anyone else I made sure that I didn't have the camera and lens set to manual. It was not in manual. Next, I turned the wheel to Aperture Priority, set my AF to AF-C, tried AF-S, etc. etc. Nothing seemed to change. Focus was still not working. I look at the top LCD and I notice that the aperture and f/stop are flickering back and forth at a 1000 times a minute so I get worried.

I remove the lens and TC, detach the TC from the lens, attach only the lens and try to focus. Focus is blistering fast. Nothing is flickering, everything is cool, camera works as expected. I remove the lens, attach the TC to the lens, put it back on the body and try again. Nothing. The AF point lights up when I press the back button focus (AF-On) but the AF is not moving whatsoever and the top LCD is flickering.

So now I'm trying to figure out.... does anyone else have this issue with their Nikon 1.4 TC II??? Is it the camera? It can't be the TC because it works perfectly fine with the D610. Never had any issues with it before until I attached it to the D750.

I contacted Nikon support both by phone and through their website. I'm waiting to see what they say or what kind of excuse I get. I hope I'm doing something wrong, but I honestly don't think I am. I think maybe the D750 is not compatible with the 1.4 TC II. If that's the case and I need to buy a 1.4 TC III, once again I'm out of luck because the 1.4 TC III is not compatible with my 300mm f/4D AF-S!

Ughhhhhhhhh!!!!

Here's a video of the problem. Anyone else getting this?

www.youtube.com/watch?v=YsLgz_HxoP4&feature=youtu.be
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(1 to 100 of 108 replies)
MOD
mausgabe Posted 6 years ago. Edited by mausgabe (moderator) 6 years ago
Clean the contacts on both sides of the TC: one side at a time, 15 mins curing time on each side, isopropyl alcohol 91%, Q-tip, cap of working side left askew for air circulation but still covering the glass.

If that doesn't fix it, you may have a dying CPU chip in the TC.

(Did you turn the camera off, mount the TC, mount the lens, turn the camera on? Or camera off, TC on lens, mount both, camera on.)

(Is there any play between TC and lens? TC and camera?)
MOD
Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
The thing is... it works just fine on the D610. It's only having issues when mounted on the D750. I clean the contacts on a regular basis, so I don't think that's the problem. I'll do it again just in case. The TC is pretty new. I bought it this year.

Well, cleaned contacts again and it's not any better. The TC is on there as tight as it needs to be. No play between it and the body.
TRANIMAGING 6 years ago
hopefully it is a firmware issues and not hardware. Not like the D750 is any different then the d810 or any other and Nikon is usually backward compatible. Lets hope it is a firmware and not the other.
MOD
Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
TRANIMAGING:

Yeah, that's what I'm hoping as well. If other people end up having the same issue, it may be a firmware thing. If it's just me, it's got to be my copy... in which case I'll have to either get it exchanged or send it to Nikon for repairs. Sighhh.
Mark Kleinert 6 years ago
I have a 3rd party tc x2 magnification which works fine with all my fast glass on my d750. I don't have a 300mm prime but I have always had problems with slower lenses f3.5-5.6. Try it with a f2.8 lens and see if it works.
MOD
Dream Source Studio 6 years ago
Mark Kleinert:

I've never had a problem using this combo before. I've been shooting that combo with the D610 for the last few months. I was reading a review where a guy was using a 1.7 TC with an 800mm lens on the D750 and he had no issues at f/8 to f/13 so... I think it's a problem with the D750. By the way that Nikon reacted to my problem (surprised), I think it's a hardware or firmware issue, not anything wrong with the lens or TC. They will need to fix it either way.
Tris Enticknap 6 years ago
Dream Source Studio:

Bearing in mind the incompatibility of your 300mm f/4 with the older 1.4TC on your D750, and the fact that the new 1.4TC doesn't work on the existing version of the lens, I'm wondering if Nikon will soon be announcing a new 300mm f/4 VR. Not that that is any help with your present situation - I'll be interested to hear what Nikon says to you, and hope that they can fix the problem.
cjpk1 6 years ago
I have the exact same set up!

Lucky enough an array of other lens combo set ups, but yes you are right, the 300mm plus 1.4t//c doesn't work. (I tried it and no joy).

On its own, as usual a gem of a lens.
MOD
Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
'Esmeralda':

The fact that Nikon themselves are baffled, I'm going to guess that it is supposed to work, but doesn't. When I called and messaged them, they did not indicate to me at all that this is a combo that isn't supposed to work. Since they're trying to 'figure it out', I'm guessing this is a D750 problem that needs to be fixed. Still waiting for further instructions from them on that. As soon as I know more I'll let you guys know.

cjpk1:

This is both bad news and good news. The bad news is that we're both SOL. The good news is it's not just my D750 having the problem, which tells me they need to work on this problem. I'm really hoping this is a firmware thing, not hardware. I think I'll feel fairly patient for a firmware update as long as it doesn't take half a year or more to come out. If it's hardware, I really hate the thought of sending it yet another camera to Nikon for repairs. It would be the third one.
MOD
acase1968 6 years ago
FYI, I just put my Nikon TC-17E II 1.7x Teleconverter and 300mm f/4 lens on my D750 for the first time and experienced no focusing issues. In fact, the combo seemed to focus much quicker than it did on my D600.
MOD
Dream Source Studio 6 years ago
acase1968:

Hmm.... happy for you that you're not having any problems with the 1.7 TC II. :) Good to know at least that one isn't a problem.
MOD
mausgabe 6 years ago
Can you get another sample of the TC-14E II? Curious if it's the TC not providing readable data to the camera (not likely, since it's OK on the D610) or the camera not accepting the lens CPU + TC CPU data (on your specific camera).
MOD
Dream Source Studio 6 years ago
mausgabe:

Since Cjpk1 is experiencing the same problem, I'm guessing it's not my TC. I was thinking about visiting a camera shop to see if they can figure it out, but I completely forgot to do that today. I was hoping they could try it with one of their showroom model D750s and maybe one of their 1.4 TC II with my camera and lens if they had one in stock. I just bought the thing. Only have it about five months, so it's practically brand new.
David Hamments 6 years ago
Hi, I just spent most of yesterday afternoon with my D750 and AF-S 300mm f4 with the TC-14EII attached and I found the combo to be outstanding! It's much faster acquiring focus than my D7100 and it keeps it. I just posted a few BIF's with the combo a few minutes ago. After reading your post, I attached it again and it works flawlessly...

Cheers and good light,
David A. Hamments
MOD
Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
dhamments2013:

Hmmm, now I wonder if I should get my D750 exchanged. You know what? That's exactly what I'm going to do. I'm getting an exchange.

One more question. I just noticed that my D750 arrived without that little plastic piece that protects the flash hotshoe thing. Did any of yours come without it? I find that a bit odd. I just noticed it when I had the D610 out to try the 300mm and TC combo again just to make sure it still works. It still does work on the D610 and it still doesn't work on the D750. With that hotshoe protector thingamajig missing, it makes me suspicious.
David Hamments 6 years ago
My D750 is missing the hot shoe protector as well..... I read on DP Review that others have noticed the same issue. Seems a pretty cheap move to save a few $$$$'s IMO.

Cheers and good light,
David
MOD
mausgabe 6 years ago
Has anyone narrowed it down further?

For example, any AF-D (aperture ring) lens + TC-xxE II + D750 = issue? (But not on G lenses with same TCs + D750?) That would be an interesting dilemma.

Or maybe the D750 is pre-programmed for the new TC-14E III that doesn't work on the 300/4D, so it reacts badly to the TC-14E II?
MOD
Dream Source Studio 6 years ago
mausgabe:

Unfortunately none of my other lenses will take a TC, so I can't attach it to any of them. If two of us (so far) are having issues with the same combo and one of us does not, I'm thinking it's a defect of some sort. At first I was going to wait for Nikon to figure it out, but then I decided what better way to find out than to get an exchange and see if it has the same problem? If both copies end up not taking this combo, I'll just send the damned thing to Nikon so they can solve this mystery and fix it.

Thing is, Nikon acted surprised that it doesn't work and instructed me to clean the contacts, so... I'm thinking it is SUPPOSED to work, but doesn't.
MOD
Dream Source Studio 6 years ago
Just updated the original post with Nikon's response to me.
Aperture_Don 6 years ago
Dream Source Studio:

Why would you even consider sending everything in. Just send the camera back and wait until they fix the problem. You have the D610, so you don't need the D750 right now.
MOD
Dream Source Studio 6 years ago
Aperture_Don:

But I neeeeeeeddddd. Lol. :D I mailed it back to Amazon today and am getting the replacement on Wednesday. There's a chance that the new copy will work properly as intended. If it doesn't, .... I'm willing to suffer for a little while until Nikon fixes it. I know it's ridiculous... but what can I say? Nikon continues to make defective cameras I love. :D
delicious parcel [deleted] Posted 6 years ago. Edited by delicious parcel (member) 6 years ago
Dream Source Studio: Sorry to hear you had a problem with your teleconverter, or more properly I should say with the combo of the D750, TC 14 II and your lens. I've sold my D610 and will be ordering the D750 shortly. Perhaps I should wait a while for Nikon to get all the bugs out... I guess the early adopters help with that process. Let's hope there is a firmware update coming.
MOD
Dream Source Studio 6 years ago
photo_enthused_:

This is always the case with newly released bodies. I enjoy the abuse by buying high and being a beta tester for Nikon. If you're a patient person, I would recommend waiting a bit for things to get worked out and the prices to drop. If you're like me, well... there's no stopping you so just go for it. :D
MOD
Dream Source Studio 6 years ago
Well,... I'm on my second D750 body and this one doesn't focus with the Nikon 1.4TC either. It does the same freak out thing as the previous body. Looks like all my stuff is going to Nikon for inspection. >:-( Wonderful! >:-(
chuck.mell 6 years ago
I just received my new D750 yesterday so I have been having a great time testing it out. Spent some time on the deck taking pictures of birds in my backyard with my Nikon 1.4TC attached to my AF-S Nikon 80-400. The focus was fast and accurate and worked as expected.

Then ... I read this post and tested my TC and 300/4 combo and it does not focus at all with the same flickering anomaly reported here. The 300/4 works great on its own.

I will be monitoring this thread very closely for any updates. Thanks to Dream Source Studio for revealing this and doing the hard work.

BTW, Mine didn't have the little black hot shoe protector either ...
always_a_student Posted 6 years ago. Edited by always_a_student (member) 6 years ago
I tried the 1.4x II with my 300 f/4 (the 1.4x III doesn't work with the 300) and had no problems. Focus was fast. I also tried the 1.4x III with the 80-400 and found focus fast as well. No problems.
MOD
Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
chuck.mell:

That is just so very odd! I'm both happy and sad to see you say that. On one hand I'm sorry you're having the same stupid problem. On the other hand, I'm happy to hear I'm not the only one with the same combo having an issue.

So far I'd say that makes three of us having the same problem. Firmware? Hardware? TC? who knows.

By the way, I was trying to create a service ticket on Nikon's website today and couldn't, because they don't even list the D750 (or the D810) on their service website yet. It wouldn't let me move forward without selecting my model, but it wasn't to be found in the drop-down menu.
MOD
mausgabe Posted 6 years ago. Edited by mausgabe (moderator) 6 years ago
Again, does the D750 + TC-14E II + any (compatible) AF-D lens work?

(Is the D750 programmed for the TC-14E III, confuses the II for the II, and only accepts G + 1.4, and not D + 1.4?)

It's only a theory — to be proved or disproved — to help narrow the issue focus.
MOD
Dream Source Studio 6 years ago
mausgabe:

No idea at this point. I just got the service acknowledgement from Nikon. Updated in the original top post.
cjpk1 6 years ago
It amazes me how some combinations work and others do not?

I have to say my 70-200mm f2.8 with the 1.4t/c on the D750 is lightning quick!
I also have the 80-40mm AF-S VRii and with the 1.4t/c on the D750 I am not happy with its performance.

I think a lot of it is down to what people expect and the variable in peoples acceptance of good bad, fast or slow.

By the way, I am not happy with the 80-400mm with t/c on my D7100, D800 or D700 either.
The 300mm f4 on the d700 is like a dream!!

C
MOD
Dream Source Studio 6 years ago
cjpk1:

They're screwing up again. If it's not one thing, it's another. This is the third Nikon body I've had to turn in to service for something. The D7000 had front/back focusing issues (major bummer). The D600 had really bad dust/oil issue that I tried to fix myself and was doing well with, but then when they started doing the shutter replacements, I sent mine in and they actually brought the problem back two-fold. Now the D750 with lens compatibility. The D610 hasn't had any issues so far, but 3 out of 4 bodies is not exactly a good track record.

What I didn't know is that the lens compatibility issue existed prior to the D750 release. Apparently there have been some D7100 owners who were experiencing the same thing I am. Unfortunately some of them never thought to send it in to Nikon to investigate, they just said "Oh well" and went on with their lives, accepting something that was clearly not acceptable.

I sort of brought this on myself by accepting to be Nikon's beta tester, but it just shouldn't be like this. I should be holding the D750 right now with TC and lens attached, shooting and enjoying photography. Instead I'm feeling angry and disappointed again. Oh well! Hopefully they fix it soon so I can go back to not being bitter. Lol.
admin
Zeroneg1 6 years ago
Well life is about lessons and forgiveness....of course patience is also well umm virtue of course we want everything to be umm perfect right from the start but that never happens. Well YOLO happens you know...
MOD
Dream Source Studio 6 years ago
Zeroneg1:

I'm a very patient and forgiving person, but even my patience is wearing thin. The people who should be learning lessons here (but aren't) is Nikon. I'll be fine once the dust settles, it's just that no other company has let me down this many times in a row. They're lucky there's nobody out there who can match their combination of sensor/interface/handling/AF/lens quality and affordability, otherwise this would prompt me to switch brands. Right now I'd have nobody to run to except Canon (who comes close), and I like Nikon image quality and performance so much better. Oh well!!!
admin
Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
I do agree that Nikon should be learning at this stage and a big karma lesson for them was the D600 fiasco which as we both know started with the D7000 oil splatter. However to keep in in perspective they had a massive flood in Thailand and a massive earthquake in Sendai to deal with.

www.nikon.com/news/2012/0203_01.htm

www.nikon.com/news/2011/0322_01.htm

As you probably know I use both systems and I wont not want to over use only one over another since these are just tool but for personal work and use I prefer the Nikons.

Lastly the DSLR and camera business is under enormous pressure coming from the smartphone and tablet sector of the electronic industry. Most consumers are sadly happy with the result they are getting from their smartphone and tablets when it comes to image and video recording. This is forcing the camera business to have a much faster rate of turn over than the normal 3-4 years which is now becoming a 2-3 year cycle if not less. Heck this has just been made worse by the innovations in the camera in the newer iPhones iPad Air2 and camera abilities in iOS8.1 like time lapse, exposure changes etc.
delicious parcel [deleted] 6 years ago
DSS: Sorry to hear your ordeal is dragging on. Call me stupid but I'm still planning to buy a D750 body just as soon as my next pay arrives (with some overtime which will help.)
MOD
Dream Source Studio 6 years ago
Zeroneg1:

Yeah.... I know... that's why I tried to keep a cool head when the oil/dust issue came up. I simply LOVE their cameras. They produce VERY good tools with great features. I can never stay mad too long, but when I haven't had lunch yet and I'm handed a box with my lens in it when I thought I could not be more clear about them keeping it, it just got to me. :D Plus I had a couple of events this weekend that I really wanted to use the D750 for. I'm so happy I didn't sell my D610. At least I have back-up that comes very close to the same image quality. Of course these are low light events so the -3EV focus would have really helped out.

photo_enthused_:

Despite all my complaining in this thread, I would still recommend the D750. If you don't have the same TC/lens combo as I do and if you don't have Sigma lenses that may need re-chipping to work properly with the D750, you'll be plenty happy with it.
chuck.mell 6 years ago
DSS: Thank you for the update. This has really gone a lot longer than I would have anticipated. Interesting they returned your 300/f4 and your TC 1.4 but kept the D750. I wonder if that isolates the problem with the camera body or maybe they duplicated the problem with their own lens and TC so they could return yours. I'm also surprised more people haven't contributed their own experience, good or bad, since it seems a fairly popular combination.

I returned my D750 to B&H since they were on holiday during this time. I stated the camera was defective because of this issue and opted for an electric gift card in exchange. I'm hoping to apply it to the bundled kit that also became available. So far, I've only received a confirmation that they have my return but it has not processed yet.

I finally learned how to slow down time in retirement ... just REALLY look forward to something!
MOD
Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
chuck.mell:
DSS: Thank you for the update. This has really gone a lot longer than I would have anticipated. Interesting they returned your 300/f4 and your TC 1.4 but kept the D750. I wonder if that isolates the problem with the camera body or maybe they duplicated the problem with their own lens and TC so they could return yours. I'm also surprised more people haven't contributed their own experience, good or bad, since it seems a fairly popular combination.


They only returned the lens, not the camera and TC. However... Last night they e-mailed me to let me know they will be returning my camera and TC on Monday without any repairs, because they have determined that there's nothing wrong with the camera or TC.

They claim that through "other" testing methods, they found the TC was working just fine. Problem is that if they attached it to any other lens besides the 300mm f/4D, it might actually work. The problem is not that the D750 + TC don't work on any lenses, the problem is that it only doesn't work with the 300mm f/4D. So yeah... in that case they wouldn't find anything wrong, because they didn't test it with the proper combo. They claim that the problem only occurs with my lens, so my lens is at fault. I have a feeling that since my lens is gray market, they feel like they can freely blame the problem on my lens and get away with it.

It makes no logical sense to me as to why a lens manufactured by Nikon which crossed the borders from one country to the U.S. would suddenly become incompatible with Nikon bodies and attachments as soon as it crossed that border. It's still a Nikon lens, it's just been imported. But here's the twist... the lens works absolutely GREAT with just the D750! The only time it doesn't focus is when the TC + lens is attached to the D750. It works absolutely great with the D610 regardless of whether the TC is attached or not, so..... Huh??? How's this possible?

So my question for you is this; Did you buy your lens brand new, was it used, or gray market?

Although I'm seething at this point, I'm trying to stay very calm just in case there really is something to this whole gray market lens incompatibility. Despite how crazy it all sounds, I'm going to give them the benefit of doubt.

When I get my D750 and lens back, I'm going to drive to the nearest photography shop and test one of their "legitimate" 300mm f/4D lenses with it. If I can't find one in a photography shop that I can test, I will rent a "legitimate" 300mm f/4D from lens rentals and give it a try. If none of these work with it, I will personally drive down to Nikon's L.A. headquarters and I'm going to personally demonstrate the problem with both lenses. It will be extremely inconvenient for me, it will cost me a lot of money to do, but if they are wrong and I'm right,... I'm not going to be a happy camper.
admin
Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
Oh boy! It has been known that the HQ Nikon Repair in Melville, N.Y. does better work than the El Segundo one. I hope you get your problem sorted out soon enough.

Their only argument is that the gray market did not pass through regular Nikon shipping and inspection channels so they will never fix it. They could always blame the lens. This is why I never have bought gray market or third party lens after several bad experiences. If something is wrong with my equipment it is all Nikon to blame unless it was a 'user error induced issue'.
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Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
Zeroneg1:

Yeah... it sucks. When I bought the lens I had no idea it was gray market. I don't think I would have purchased it if I knew. I bought it through one of Amazon's sellers and they never specified if it was gray market or not. Their description only said that it was used.

Zeroneg1:
Oh boy! It has been known that the HQ Nikon Repair in Melville, N.Y. does better work than the El Segundo one. I hope you get your problem sorted out soon enough.


I can confirm this. El Segundo office (which is now located in L.A. on Wilshire Blvd.) has failed me multiple times. They never properly fixed the D7000 focusing issue even though it went in three times. They never fixed the oil/dust issue after sending the D600 in twice (I got that resolved through New York), and now they haven't fixed the D750, which (if my theory is correct) I will probably have to send in again. Their track record with me isn't exactly great. There is a lot of incompetence over there.
ColetteSimonds Posted 6 years ago. Edited by ColetteSimonds (member) 6 years ago
Zeroneg1:

Dream Source Studio:

I joined just to refute your statements. I keep an eye on this group because I am thinking of the D750.

Do not generalize your perceived experience. I live in El Segundo, and had to deal with the repair center when it was located 5 min. from where I live. (But now located in LA). I have only good words to say about them.

I am not sure why, if you are located in New York, you would know much about the former El Segundo facility. Arrogance and wanting to know it all seems to reign in some of those group threads, and with some people, always the same.. The truth is that these people at the repair center not only were very courteous, nice, but they cleaned my camera for free and did enough for me that I have to report only good experience. After all people tend to be nice to nice people and not arrogant people like some here.

This facility DOES fix cameras when it's needed. I visited in person and had a chance to chat with other happy customers. If a part is needed turn around can be a bit longer, but the job is done.

Who in their right mind will make statements like you 2 do, without foundation. Perhaps you had a bad experience, but sometimes people WANT to see a bad experience, and also people are very rude. I do sense rudeness here.

Who buys a grey market product without knowing it??? Are you admitting you are stupid or what? I certainly don't and many don't. It's not true that grey market are not labeled as such. And if it's not labeled, the low price is often an indication. Please take responsibility for your mistakes and suck it up without blaming others. You sound like a child.

Based on my positive experience, I really can't stand when people bash the repair facility, and especially those who are not from the area like Zeroneg who seems to know it all , and all over Flickr, but probably doesn't know as much as he claims. Where is your work showing your knowledge??

I am done now. Stop bitching about the wrong things and start shooting something nice from which we can learn..but where is that? Your whining is really irritating. And, I know, I don't have to respond to what I don't like, but, in this case I had to defend people I had contacts with and served me very well. I wasn't going to let it fly.
admin
Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
Sorry if you feel that way. My statement about the El Segundo facility is based on moderating for several Nikon groups and reading threads about it for years. I am expressing an opinion formed from several threads over the years.
ColetteSimonds 6 years ago
Zeroneg1:

Then you don't know how to make a judgement based on your own experience??? That's your problem. You moderate too many groups whose main purpose is to bitch and throw statements right and left. Remember that happy people don't go to a group to report their experience. Happy people aren't even in a group. Those threads are idiotic for most part. Discussions are populated with people whose only purpose is to complain most of the time, and it's always the same people. Why don't you open threads intended to show what the camera can do??? Perhaps the complainers would stay away. Actually they would as they are only interested in bashing and complaining.

Again, my experience with the West Coast facility is good. When they cleaned up my camera, it was I who messed up the camera and they had no obligation to be nice.


Moderate less, shoot more and don't get influenced by those complainers. Think for yourself. If you have no experience, then fine, but don't bring unfounded judgement.
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Dream Source Studio 6 years ago
ColetteSimonds:
Who in their right mind will make statements like you 2 do, without foundation. Perhaps you had a bad experience, but sometimes people WANT to see a bad experience, and also people are very rude. I do sense rudeness here.


The kind of person who's now had three cameras returned to her multiple times without having them fixed by this facility. I am speaking from experience. I don't ever go out wanting to have a bad experience. I've never had to do this with any other manufacturer and I don't go out of my way to complain when I don't have a good reason to. I'm always nice to begin with, but with Nikon, being nice never got me anywhere. I always try to keep things as civil as possible when I speak with them, but when I'm nice, they get nothing done. I had to do a lot of begging to get them to take my D7000 in for repairs for example.

ColetteSimonds:
This facility DOES fix cameras when it's needed. I visited in person and had a chance to chat with other happy customers. If a part is needed turn around can be a bit longer, but the job is done.


I'm sure they have to fix something once in a while to keep their jobs, but that doesn't mean every customer who walks in, calls in or e-mails is going to have a positive experience. I wish I could say that I was happy with their work, but I can't.

ColetteSimonds:
Who buys a grey market product without knowing it??? Are you admitting you are stupid or what? I certainly don't and many don't. It's not true that grey market are not labeled as such. And if it's not labeled, the low price is often an indication. Please take responsibility for your mistakes and suck it up without blaming others. You sound like a child.


The seller labeled the lens as used, not as gray market. Used lenses often go for the same price as gray market lenses, so no... my suspicion was not aroused. Generally sellers are upfront about a product being gray market. Besides... it's not the lens that's the problem. It works just fine. It's the camera that's having the issues.

ColetteSimonds:
Based on my positive experience, I really can't stand when people bash the repair facility


Well then you'll just have to accept the fact that not everybody goes around always having positive experiences with products that you've had good luck with. There are millions of examples out there of businesses and products that many people enjoy, but some have had issues with. There are hundreds of products I love, yet I accept that there are people who have had a negative experience with the products themselves, or with customer service. It happens all the time. I don't go around calling people stupid for having a problem. I don't know what they've been through and if they feel motivated enough to vent their frustrations, it must have been bad. I can say that my experience was positive, but what happened to me doesn't change the fact that the other person had been wronged in some way.

ColetteSimonds:
I am done now. Stop bitching about the wrong things and start shooting something nice from which we can learn..but where is that? Your whining is really irritating. And, I know, I don't have to respond to what I don't like, but, in this case I had to defend people I had contacts with and served me very well. I wasn't going to let it fly.


I'm happy for you that they were nice to you and solved all your problems. Unfortunately they haven't solved mine. When they do, I'll report on it and I'll happily give them credit.
chuck.mell 6 years ago
I did purchase my 300/f4 second hand but I confirmed it was a USA version ahead of time and have it properly registered. I know my TC works with my D7000 and 300/f4 combination as well as the D750 and the AF-S 80-400 combination.

I'll report back when I get my replacement D750 and can test the combination once again.
ColetteSimonds 6 years ago
If you are not happy with your brand of camera and/or service, then change brands.

Some people think they have a problem with 3 cameras in a row. Those people will always have problems and feel they have been victimized. If you are not satisfied, change. That's what I do. If I am not satisfied the first time, I quit that brand. But it's amazing to me that the same whiners will continue buying products that they claim are faulty and that are not fixed properly. If 3 cameras were returned without proper fixing for enough of their customers, they wouldn't have survived and we wouldn't have this conversation.

But....I do recognize that some people waste their time complaining instead of shooting. Some people blame equipment that they never have a chance to truly get acquainted with.
I guess the same people are unlucky time after time. How can they be taken seriously?

And..it's not just in this forum. Yes, the same people come back complaining on various threads, but they are always the same. That should say something.

It's much easier to complain than learn and create, of course.
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mausgabe 6 years ago
It's much easier to complain

Any mirrors nearby?
mo'funk Posted 6 years ago. Edited by mo'funk (member) 6 years ago
@OP thanks for sharing your story. I've been coming to these forums since my first DSLR and I know a lot of the people in this group I've been reading their comments for over 10yrs. Its a great resource of information from real users.


Its funny that people would say switch brands when its a great brand. I've been using Apple computers aghh since college. Lost a lot of papers, but still will buy them because it fits my needs. I'm guessing that the OP chose Nikon because of the same factors.

I know I will not use the TC 14 II, but its good to have this resource for friends who are considering paring it with the D750.
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Dream Source Studio 6 years ago
ColetteSimonds:
If you are not happy with your brand of camera and/or service, then change brands.


While Nikon service can be terrible in some parts of the world, Nikon still produces some of the best combination of sensor/image quality, AF accuracy and ergonomics for extremely competitive prices. That's the reason I stick to Nikon and am not tempted by other brands. When they work properly, they're amazing. When they don't, I get frustrated. I'll take the occasional frustration with Nikon over other brands for now.

ColetteSimonds:
Some people think they have a problem with 3 cameras in a row. Those people will always have problems and feel they have been victimized.


That's two cameras in a row, not three. I skipped any problems with the D610 (which was nice for a change) and now it's back to issues with this one. If I could afford a longer lens of the same image quality without having to use a TC, this wouldn't bother me at all. The 300mm f/4D + TC however is a very important combo for my use, so this affects me in a big way. If your favorite lens combo didn't work on your D7100 (especially when it works perfectly on your other Nikon bodies), I'm sure you would be frustrated too.

ColetteSimonds:
But....I do recognize that some people waste their time complaining instead of shooting. Some people blame equipment that they never have a chance to truly get acquainted with.
I guess the same people are unlucky time after time. How can they be taken seriously?


I for one am glad to see people mention problems with equipment. If I'm about to buy a camera, I want to go into it knowing what could go wrong. Admittedly I should have waited to buy instead of jumping right into it, but at least my experience might help someone else who also uses the same lens + TC combo, because they will be aware of the fact that this problem can occur. They'll be prepared for it.

ColetteSimonds:
And..it's not just in this forum. Yes, the same people come back complaining on various threads, but they are always the same. That should say something.
It's much easier to complain than learn and create, of course.


It's a bit hard to create when you can't use your equipment, because some important aspect of it doesn't work for you. The same people complain, because they're the ones having problems with their equipment and they need a place to vent. Unlike satisfaction, frustration and anger is a very strong emotion that needs to have an outlet.

Admittedly some take it to the extreme, but many times having someone report on a problem and others joining in to let you know you're not the only one, it gives you reassurance that you're not crazy. If I hadn't asked about my problem on this forum as well as on dpreview.com, I would go on thinking it was just me. Since I asked, I now know there are others like myself, having the same exact problem with the same lens, and in some cases with other Nikon lenses as well.

The point of this thread is to give updates on how the problem is getting solved and whether it is getting solved at all. If all this ends up being my fault, I will come out and say it, but thus far it looks like Nikon's quality control is at it again.
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Dream Source Studio 6 years ago
chuck.mell:
I did purchase my 300/f4 second hand but I confirmed it was a USA version ahead of time and have it properly registered. I know my TC works with my D7000 and 300/f4 combination as well as the D750 and the AF-S 80-400 combination.

I'll report back when I get my replacement D750 and can test the combination once again.


Excellent. Thanks for the update. That confirms my suspicions. I'll still test it with another "legit" 300mm f/4D just to make sure, but seeing as yours is a U.S. version, it makes me feel better about being pissed. Lol.
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Dream Source Studio 6 years ago
Just updated at the top. Looks like the mystery continues.
craig21746 6 years ago
Since you live in LA , curious why you have not taken the D750 and 300 lens into nikon service and shown them the problem face to face, instead of dealing through the web site. Just a thought.

Craig
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mausgabe 6 years ago
Do you have a 105/2.8G VR or 70-200/2.8G VR / VR II?

Does the TC-14E II work OK with either / both of those on your D750?
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Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
craig21746:

Believe me, I'd love to, but consider this; Their hours are not normal hours and they're not open every day. They close way before I get off work and they're not open on the weekends. That means I'd have to take a day off (which means no pay for me) and gas to get up there in traffic (it's about an hour away from me. I'm not in L.A.). By taking a day off and having to pay for the gas to drive up, I'm losing somewhere around $200 or more to demonstrate the problem to them, something they can do themselves if only they read my description and listen to me. I was pretty clear in describing what the problem was. So, would you sacrifice that much money to do their job for them?

mausgabe:

I do not own those two lenses yet, but from asking around, there are others who are having a problem with the same lens combo, but not when the TC is attached their other lenses. While coincidences do exist, I'm fairly confident that it's the 1.4TC + 300mm f/4D on the D750 that's causing problems.
craig21746 6 years ago
Hopefully the problem will be resolved without you going there, if it isn't you may have no choice.
When you consider all the time you have spent dealing with Nikon Service, the time lost you could be using the system, and the fact the issue still may not be resolved, $200 may not not look all that bad.
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Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
craig21746:

Well, it's bad when you just paid;

- $2,300.00 + tax for a brand new item, discovered it doesn't work as promised, had to return it to Amazon and get a replacement, got new one that also doesn't work as promised.

- spent $20.00 on shipping, spent about three weeks without it only to have it sent back not repaired,

- spent $100 to rent another lens to test it with because I can't trust Nikon to test it properly,

- I'll have to spend over $200 on missed work day + gas if it turns out I was right.

So.... when I add it up, this camera will probably end up costing me around $2,820.00 total, not to mention the time wasted and the aggravation. I tried to avoid renting the lens, but no local camera shops have it in stock where I'd be able to try it out just briefly.

Like I said up top, I'm open to the possibility that maybe it's not the camera, maybe it's my lens,... but... why would other people have the same problem with the same lens + 1.4TC and D750 that I do? It would seem like a pretty big coincidence, especially since the lens itself works great on the D750.
chuck.mell 6 years ago
It Works!!

The UPS truck finally showed up this afternoon around 4pm and the first test I did was the TC and the AF-S 300mm f/4 and it focused just like it should. I tested both lens combinations I have with and without the TC and no AF problems at all. Makes me think there was a "bad" batch of D750 bodies out there that had this particular issue.

I'm just sick about all the pain and torment you have gone through, Jana(?), but maybe your easiest strategy is to just keep replacing the D750 body with Amazon until you get one that works.

BTW, your wildlife photos are absolutely stunning ...
Mikko Väänänen 6 years ago
I have experienced somewhat similar issues with my D610 and Sigma 120-300/2.8 Sport (with and without TC's). In my case it was something about electrical contacts in the mount, since there is some play between the body and lens or TC (more than with my other lenses). If the lens looses contact, I could twist it a bit and it recovers. I haven't yet got it repaired as it doesn't happen all the time. Try twisting and moving the lens when mounted and see if it starts working.
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Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
chuck.mell:
but maybe your easiest strategy is to just keep replacing the D750 body with Amazon until you get one that works.


Very happy to hear about your good luck. :) At least you got it sorted out.
Me? No such luck. This is my second D750. I just checked to see if I can return it to Amazon and I'm literally like 3 days within the return limit! I've just filed a return/replacement order with them. God I hope third time's a charm!!!

It will get picked up on Monday, I'm assuming, and my replacement will probably be sent the same day (I hope sooner!).

I'm really upset over this not because something is wrong, but because Nikon doesn't want to acknowledge it, they have wasted 3 weeks of my time now, and they are forcing me to take additional steps and costs in order to make it right. It's hard to enjoy something when it's this much of a pain in the a$$.

Mikko Väänänen:

Your problem is also not fun, but since it is a third party lens, I can see why you might happen to have issues. Nikon and Sigma don't like each other much. :) There have been lawsuits between them and with every new camera, some Sigma lenses will have to be re-chipped by Sigma in order to work properly. My lens and TC have zero play. Once they're attached, there's no twisting them any farther. They're on there pretty tight.
artthatsmiles 6 years ago
I'm glad I found this thread. I'm frustrated as you and have the exact same problem. My Nikon 300mm f4 with my TC-14E works just fine on my Nikon D300, but that combo doesn't autofocus at all with my D750. The TC-14E works great with the 105mm 2.8 VR lens on the D750 and focuses fine with just the 300mm f4 lens on the D750. I'm perplexed as what to do also. I think we should share this thread with Nikon, to let them know their is a problem somewhere. I don't know how widespread the problem is, but we certainly aren't alone. So far I haven't had success with Nikon on the phone (they say it should work), but did email them regarding this issue. My first Nikon D750 I ordered had a memory buffer issue, as soon as the memory was full it would crash. This Nikon D750 has been working great, until I went to shoot some wildlife with my TC-14E. I might return this body again, hopefully 3 times is a charm?
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Dream Source Studio 6 years ago
artthatsmiles:

I'm happy that you spoke up here. That's four of us now that we know of. There could be many more, but not a lot of people shoot with this lens + TC + body combo yet. I think four cases in a small community like this group is a pretty big percentage for the realm of "coincidence". The best thing we can do is bring attention to the issue and contact Nikon service to let them know this is not isolated to one or two bodies.

Where did you buy your lens? Is it a legitimate copy or a grey market lens? I ask, because Nikon is blaming my grey market lens for the problem instead of blaming it on the D750. Makes no sense at all, but it helps if more people with a legitimate 300mm f/4D speak up.
mrksaari Posted 6 years ago. Edited by mrksaari (member) 6 years ago
Looks like there is something with 300mm/f4 & TC combo that some/all D750 cameras can't handle properly. Today I quickly tested D750 with 300mm/F2.8 VRII + TC1.4II and AF worked as expected.
artthatsmiles 6 years ago
It's a USA 300mm lens purchased from Adorama. TheTC-14E I purchased off ebay a couple of years ago and the serial number doesn't have US in front of the serial number, so might be grey market. It's also the older TC-14E not the II, but Nikon's own site says they are operationally identical. My feeling is perhaps the D750 is more particular, so the slightest thing not perfect on the lens and TC will give it problems. I've cleaned my contacts several times to help. I might try bringing the camera and lens combo to a local camera repair shop to look at it. Perhaps professional cleaning of the contacts could work? Another thing I may try is purchasing a new TC-14E and see if that works. After hearing about your experience sending them in to Nikon, I don't think I want to go that route. I'll check your updates with interest. and will report any news on my end too.
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Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
artthatsmiles:

I tried cleaning the contacts on the camera, TC and lens. It didn't change anything. You can give that a try just to eliminate the possibility, but I don't think it will solve the problem.
artthatsmiles Posted 6 years ago. Edited by artthatsmiles (member) 6 years ago
Just an update..
To make matters worse, my 300mm lens by itself has stopped auto focusing on the Nikon d750, even without the teleconverter. I brought my camera, lens, and teleconverter to a local camera repair shop that I trust and talked to the technician for a while. He agreed that the contacts were clean and both the lens and teleconverter appeared to be in good shape and the connection seemed solid. So he is perplexed about this problem too. He did tests with his D700 and both the teleconverter and the 300mm lens focused great and still does on my Nikon D300. I tried to locate a store that carried the Nikon D750 in my area and could only find Best Buy. I took my lens and teleconverter to Best Buy to try on their D750 camera, but they wouldn't remove their security system that prevented me from changing it's lenses. Weird they weren't more cooperative, because at this point if it had worked I would of just purchased a new D750 on the spot there, even with having to pay sales tax. I haven't heard a response from Nikon on this issue. I had sent them two emails on Friday. Eager to hear how things worked out with your rental lens Dream Source Studio.
artthatsmiles 6 years ago
Thanks for the update Dream Source Studio and all your testing, very helpful. However, it's frustrating indeed and feel your aggravation. I really don't think it has to do with USA vs non USA lens, (mine is a USA). It's helpful knowing trying new bodies didn't help and seems like the problem is indeed some of the 300mm lenses out there and how it communicates with the Nikon D750. The technician I talked to said he felt the auto focus motor ribbon inside the lens isn't getting the message to focus, but that the contacts and everything else on the outside looks fine.
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Dream Source Studio 6 years ago
artthatsmiles:

So sorry to hear about your ongoing issues as well. I can't believe your lens stopped working with the D750 even when by itself! It HAS to be related to the body. If the lens was broken (all of our 300mm f/4 lenses in fact), they would stop working on our other bodies as well. That's why it makes no sense to me. Do you have a Nikon service center near you where you could take your lens and body to? I don't want to suggest renting gear to try out with it since at this point it would be a waste of money, but to demonstrate to them personally might do something. What that "something" is, I don't really know. >:-(
D. Head 6 years ago
Thats really weird... are you going to take every thing to the nikon repair place in LA and show them what you're going through?
artthatsmiles 6 years ago
Dream Source Studio:

Nope, no Nikon Repair Service anywhere near me. I'd have to ship it, so probably won't. But I will try another body, but sounds like it won't be making any difference.
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Dream Source Studio 6 years ago
Eric framed:

I was thinking about it. I might do that, but I already know the answer; "It's your imported lens that's the problem". I'll update if I do decide to drive down there one day.
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Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
I dont want to think it but it is possible that this related to the Sigma lawsuit (VR reverse engineering by Sigma) wherein Nikon is now enforcing their intellectual property and marketing decision via firmware so if you are using non officially imported lens or accessories they will not function with your camera. We know this already with third party lenses not functioning with new models unless the firmware or chip is updated.
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Dream Source Studio 6 years ago
Zeroneg1:

So you think they developed software for the D750 that would identify import copies and cease to function with them? Interesting theory, if true. If that were the case, I wish they had announced this so that people don't try saving money by buying gray market equipment purposely. I bought mine gray market unknowingly, but had I known it was going to come to something like this, I would have had the awareness to check the serial number before purchasing.

The reason I don't think this theory fits is because what if you go on a trip and decide to buy a Nikon lens in Europe for example? It would be stupid of Nikon to sabotage their own products. No?
admin
Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
Dream Source Studio:

Actually they have been dissuading people from buying Nikon products outside of their officially imported channels for decades by not ever either fixing gray market or making you pay for it even though if it was a officially imported one, you would be covered by the warranty.

This is why I have only been buying USA warranty Nikon for years now since I do not want to get into this very possibility or issue. They surely can easily say it is your gray market whatever that doesn't work which is something they cannot say if everything in your Nikon system is officially imported.

Keep in mind that I do understand that it should be the same thing but in these days of firmware and smart technology, nothing prevents them for doing it at all. Think of it as like the old DVD REGION thing. A DVD is a DVD but they restricted it by Regions.

Reading above the common denominator is one of the items use in the combo was gray market or have unknown origins. I surely hope this was just a glitch with the 300mm f/4,accessories or the D750 lens mount and not my premise above.
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Dream Source Studio Posted 6 years ago. Edited by Dream Source Studio (moderator) 6 years ago
Zeroneg1:

To be honest with you all I really want is a straight answer from Nikon as to why this is happening. If it's due to the fact that it is gray market, I'm able to accept it and say that I f****d up,.. but then I would still wonder;

a.) why it works fine without the TC.
b.) why some people with a U.S. version of this lens are also having the same problems only when the TC is attached.

So... that's really what's puzzling to me. If they didn't want gray market lenses to work with their new models, I would think that my lens wouldn't work at all. I would also think that people with a U.S. version would have zero problems. If it's some conspiracy against gray market lenses, there shouldn't really be any gray (no pun intended) areas of one lens working and some other copy of the same lens not working. Know what I mean? It's too inconsistent to be considered a planned and well-thought-out policy.
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Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
Agreed well the worse case scenario we have is it is a lens mount issue due to the D750 varying tolerance because it is mounted on the polycarbonate material instead of being mounted on the magnesium alloy block although the D7000/D7100/D600/D610 were mounted the same way even dating back to the early consumer DSLRs. But this is a guess based on the D750 parts display.

Nikon D750 Lens mount,Mirror and Shutter assembly (front)
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Dream Source Studio 6 years ago
Zeroneg1:

Uhhhhhh...... now THAT is an interesting theory. :)
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Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
Well a lens mount has a tolerance, same with the AF module and various things on the camera.

Can you take a shot image of the lens mount contacts of your D750 and the 300mm lens showing the AF contacts on both?

Actually if either of the theories are valid or any other, they would never be publicly admitted, they would only keep fixing it. It is not just to protect intellectual properties and proprietary technology/information but it is also ingrained in the Japanese culture of saving face.
chuck.mell 6 years ago
I also belong to a hiking forum up here in the Pacific Northwest. In March, 2013, I was contributing to a thread where another forum member rented an af-s 300mm along with the TC1.4 to test with his D7000. The quick story was his D7000 would not auto focus with the TC and the 300mm but the lens worked great by itself. No detailed information about the aperture value flickering like we're seeing but just would not function. The rental store had not heard of that before and could/would not search their records for the last time that combo may have been rented.

This is not a recent or isolated incident of this particular problem. I could provide a link to this thread through a PM if interested.
MOD
mausgabe 6 years ago
I had no problems with that combo on D700 nor D800, FWIW.
MOD
Dream Source Studio 6 years ago
chuck.mell:

I've seen someone mention they had this problem with a D7100 and they simply never investigated it, just accepted that maybe the two were not compatible together. Nikon claims they are compatible, but I guess not enough people report the problem for them to do anything about it.

mausgabe:

Yeah, my D40X and D610 have zero issues with this combo.
admin
Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
Do you know what the D750 shares with the D7100? It is the same Nikon Advanced Multi-CAM 3500 (AF Module) although altered for DX for the D7100 (Nikon Advanced Multi-CAM 3500DX) and optimized for FX in the D750 (Nikon Advanced Multi-CAM 3500 II) but this is the same AF module used on the D4 (Nikon Advanced Multi-CAM 3500FX)
TheOriginalSteve 6 years ago
In your case I would get your money back then take your 300mm lens and tele converter to a local camera store and go through their stock of D750's until you find one that's satisfactory. You might have a drive but it would be worth it! Failing that save up some more money and buy a used D4 which again you have tried before handing over the cash.
TRANIMAGING Posted 6 years ago. Edited by TRANIMAGING (member) 6 years ago
I think it is firmware. This af system has been used on d810 before. Nikon making harder for sigma lenses to work on nikon body instead just crippling their own.
MOD
Dream Source Studio 6 years ago
TheOriginalSteve:

You're right. I probably should do that, but I'm not sure how open-minded the stores are about taking out three or four of their brand new cameras and letting me test them. This would be my third return and I think I'm just getting tired of the exchange process. I'll wait to see if a new 300mm f/4 is going to be released and will exchange mine for that in the future. For now I guess I'll shoot the lens + TC on my D610 and use just the lens without the TC on the D750.

TRANIMAGING:

I think that's a very good possibility.
beachwalker2007 Posted 6 years ago. Edited by beachwalker2007 (member) 6 years ago
Dream Source Studio:

Sorry to hear about your continuing troubles - but since your lens is a gray import, NikonUSA will continue to stone-wall you and be of no help. Try contacting Authorized Photo Services, describe the problem and find out if (a) they can update the firmware in your lens (and maybe also the TC) or alternatively (b) exchange the chips in either of them. Might be worth a try - as I agree with TRANIMAGING that this likely has to do with firmware. I am just not sure if it is the lens (since it works by itself) or the TC (but then, apparently no TC works with your lens on a D750). Hence my belief that updating the firmware in both your lens and the TC will make things right.


BTW, NikonUSA refusal to work on gray imports is understandable - but also goes to show how deceitful Nikon is - because it is Nikon Japan that channels those lenses into the "side channels" so they can claim sales in their books without having to ever worry about warranty issues. You could actually send your lens to Nikon Japan - they will work on it and likely fix the issue as well - it's NikonUSA that won't do a thing for you as soon as a gray import is involved.

Re: Sigma - just had this happen yesterday - updated the firmware in my D7100 to the latest version - and now my Sigma 150/2.8 won't AF in live view (it did with the previous version).

Since you already tried 3 D750 bodies, I believe that trying out 10 more won't solve your issue.

If I can make time in the next few days, I might take my TC-14E and 300/4 AF-S to the local dealer and see if it works on a D750. Don't even know if my 300 is US or not - do the US imports have the US stamp in front of the serial number? Mine is definitely pre-2006 when the serial numbers changed from 2xx xxx to 3xx xxx.

Here's another idea - read this post on dpreview - could be a "simple" issue with the TC adding to much resistance - the symptoms there were the same as yours - flickering display and no AF: www.dpreview.com/forums/thread/2005263#forum-post-23566409 scroll down to Joseph S Wisniewski's response. NikonUSA won't work on your lens, but APS might be able to make the necessary mods. A thread with the fix is here: www.dpreview.com/forums/post/9602000
TheOriginalSteve 6 years ago
One advantage of buying a pro camera like the D800 or D4 etc is that you don't have the ridiculous grey import situation when it comes to after-sales - the guarantee is honoured wherever.

I reckon the issue is with your lens/convertor combo not the body. Have you tried your converter with another 300mm lens? Electronics can be weird.

I wouldn't worry about the sales staff, it's their job to keep customers happy and coming back, at least you buy stuff ;-)
admin
Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
beachwalker2008:

It makes sense for this to be a possible grounding issue because this is what drives not just the built-in motor but also the SWM this is why there is a difference in the 'juice' supplied to consumer,prosumer and Pro bodies to the SWM/built-in AF motor. It could certainly be both a grounding issue and a firmware situation.

This policy of Nikon not covering unofficially imported non-warranted items has been in place almost forever and is harder to get around once the electronics played more in the camera function unlike during the full analog days with levers,gears and bayonet mounts only to deal with with no real physical differences between gray and USA import which now maybe has an 'electronic/firmware difference' as well.

I am afraid we would see the implication of this more and more in the future due to the existence of the data transfer (metering,AF etc. which shows up in EXIF data and other metadata) between the lens,camera body.
MOD
Dream Source Studio 6 years ago
beachwalker2008:

That is extremely helpful. Thank you for finding and posting this! I'll try to find repair shops that would be willing to check this possibility out and fix it.
beachwalker2007 6 years ago
Dream Source Studio:

Hope it helps. I have no experience with any Nikon repair shop but have always heard good things about Authorized Photo Services (which I mentioned above).
MOD
Dream Source Studio 6 years ago
beachwalker2008:

Thanks again for your help. I updated the original thread and a solution is now on the way. :) I'm really glad I made this horribly long post and really happy that you guys participated in the nightmare. That's what these forums are all about. I don't know how long it will take me to drop it off and get it fixed, but at least now I know it's a real possibility. :)
admin
Zeroneg1 Posted 6 years ago. Edited by Zeroneg1 (admin) 6 years ago
Well I'm so glad its not the lens mount issue,firmware or AF module issue :)

So happy for you that you have found the solution to your problem and helped others along the way as well.
Tris Enticknap 6 years ago
Really glad that you have found the solution to the problem. Shameful though that Nikon service were either unaware of this, or just didn't want to know.
chuck.mell 6 years ago
When I received my replacement D750 body I tested the TC and af-s 300mm first thing and it did work. It's not the combination I go to very often as my af-s 80-400 with or without the TC seems to get on my D750 first.

Reading the latest findings I thought my situation was strange too because the serial number on my 300mm puts it about 9 years old. Soooo .... Just to make sure I tested this combination again and this time it did NOT auto focus. I don't understand why it worked at first and now it doesn't.

I need to decide where to go from here.
TRANIMAGING Posted 6 years ago. Edited by TRANIMAGING (member) 6 years ago
need to clarify. So are you saying the older 300mm f4 needs to be rechipped or the 1.4 tcII? Are you also saying you have a grey import tc and this is the reason it needs to be rechipped? Why would a 1 year old d610 be able to use this combo verse the few months old d750? But d750 works with the 300mm without tc. Just doesn't makes sense. Nikon would have to take off the claim of legacy lenses for d750 if true.

edit: I see it is the lens that needs rechipping.
artthatsmiles 6 years ago
Thank you Dreamwalker and Dream Source Studios, great information and gives me hope. I'm working on becoming a NikonPro member, so I can get faster turn around for the fix hopefully.
artthatsmiles Posted 6 years ago. Edited by artthatsmiles (member) 6 years ago
I forgot I did not purchase my 300mm lens new, because it was in near mint condition when I purchased it 3 years ago. But I ran the serial number and it was pre 2005 lens (so possibly never rechipped). Hopefully Nikon will rechip it for free, but I'll see. Good to understand what is going on or at least I think so.
D. Head 6 years ago
Just youtube it and repair it yourself... lol JK
MOD
Dream Source Studio 6 years ago
Zeroneg1:

I hope it does help someone out there. :) I'm glad too.

Tris ('Esmeralda'):

This is what puzzles me. When they claimed it was my lens, they could have mentioned something about this possibility. They didn't have to touch it, but it would have been nice to know that this memo was out there for this specific lens model along with a few others. If they saw that it worked with other bodies and only had an issue with this newest one, exhibiting the same typical symptoms, you'd think they'd be aware of it. Oh well! I wonder if my inquiry had anything to do with them updating this memo last week.

TRANIMAGING:

The TC is a legit U.S. copy. The lens is gray market. I bought both off Amazon.com, but bought the lens used. Seller said nothing about it being gray market and the price of the lens was the same as other used copies. The TC is supposedly fine, it's the lens that needs to be re-chipped.

artthatsmiles:

Happy I could help! If it's a little older, that's very possible. My lens was in near mint condition as well when I bought it, I never ran the serial number, but now I'm curious. I agree that it's really good to finally know what's going on. Let me know if NP membership is really worth it.
MOD
Dream Source Studio 6 years ago
Eric framed:

Lol! Hmmm.... No. :D
beachwalker2007 6 years ago
Dream Source Studio:
I'm going to drop the lens off (or mail it to Kurt's Camera Repair in San Diego) when I can. From the quick guesstimate they gave me, it should cost around $198.00 for labor and $75.00 for the new circuit.

Have you had the modification done yet - just wondering?
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