Discussions (845)

Autofocus Problems

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NiaLianne90 says:

Hi Guys,

I've only had my D750 since June 2017, I am having autofocus issues. Initially, I thought I somehow didn't know how to work this camera (upgraded from d5100). Now I realize it's the camera. I've tried cleaning the sensor and tested my lenses and I'm still having the same problem. I can manually focus. I don't have any error messages showing. I put my serial number for the recall but it says my camera is fine. Just wondering if anyone has had the same issues and if they resolved it on their own?
7:14AM, 9 September 2017 PDT (permalink)

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NiaLianne90 says:

Edit: I purchased my d750 in March 2017.
23 months ago (permalink)

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Zeroneg1 is a group administrator Zeroneg1 says:

Which lens did you try on it and what AF modes? Are the lenses AF-D or AF-S? Is the A/M switch set to A on the lenses? On the body?
23 months ago (permalink)

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NiaLianne90 says:

AF-S 16-35mm 1:4G
AF-S 50mm 1:1 8 G
AF-S 85mm 1:1 8 G

Yes, everything is a switched to M/A and AF on the body.
23 months ago (permalink)

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Zeroneg1 is a group administrator Zeroneg1 says:

Try cleaning the lens contacts on the lens mount on the body and on the lenses with a cloth.
23 months ago (permalink)

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jan_gaertitz says:

Hi,

Based on your description it's for me not clear, what exactly happens at your D750.
1) Do the lenses within the lense move? (if not, that would be an indication, that the focus drive(s) would not be controlled resp. not powered up)
2) Does the camera not detect the point to focus on? (if not, that would be an indication, that the camera can't focus to the object)
3) Does the camera detect the point to focus on, but the lens does not be focus on that point? (in that case: did you adjust the lenses for the D750 already?)

BR's
Jan
23 months ago (permalink)

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NiaLianne90 says:

ok, That worked for the 50mm and the 16-35mm. I did that before and it worked but then I had the same problem. Should I just cleaning the contacts whenever I switch the lens?
23 months ago (permalink)

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NiaLianne90 says:

jan_gaertitz:

It doesn't detect a point to focus on. I try to focus on an object in the photo , but it won't lock focus and the whole picture comes out blurry.
23 months ago (permalink)

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NiaLianne90 says:

NiaLianne90:

Well that was temporary, it still having the same problem after cleaning
23 months ago (permalink)

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NiaLianne90 says:

jan_gaertitz:

actually seems like all three aren't happening. When I press halfway down on the shutter release button it doesn't do anything. No beep, not focusing on anything. Inside the viewfinder I get the small red box but it'll just take the picture/
23 months ago (permalink)

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Zeroneg1 is a group administrator Zeroneg1 says:

Did you drop the camera recently or had ot suffer some kind of shock?

It looks to me it needs to go back to Nikon for service/repair.
23 months ago (permalink)

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NiaLianne90 says:

Zeroneg1:

Nope. Sad to say I haven't been able to use it much since I got it. It's been in my camera bag safely away. I've had this issue since I got it.

Yeah, do I need to call them first or just put a service request in on the website?
23 months ago (permalink)

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NiaLianne90 says:

Also, I wonder if it would be covered under the one year warranty?
23 months ago (permalink)

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Zeroneg1 is a group administrator Zeroneg1 says:

That all depends on what happened to the camera. Only Nikon would know for sure if what they see is covered or not.

Fill out the online for form service request, calling would just walk you through the possible wrong settings that might contribute to your issue. If you always had this issue why did you wait this long?
Originally posted 23 months ago. (permalink)
Zeroneg1 (a group admin) edited this topic 23 months ago.

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NiaLianne90 says:

Zeroneg1:

Ok. I honestly thought I was doing something wrong (I. E settings) and It wasn't consistent at first. Plus I just haven't used it much.
23 months ago (permalink)

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jan_gaertitz says:

Hi,

I'm now back from holidays and while taking pictures when everything was grey due to weather, also my camera could not focus (a minimum of differences in contrast is needed). In these cases I changed the focus point and then it worked or I changed to manual focus. To judge your cases, I would need a sample picture, where you mark the point, where the camera could not focus.

By adjustment of the settings its normally that way implemented/set by default, that the shutter is not released if the camera has not focused.

If this needed difference of contrast is given and the camera still can't focus, I recommend to contact the service center.

Cleaning of contacts is normally not needed when changing lenses.
23 months ago (permalink)

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NiaLianne90 says:

Here's a sample image.
www.flickr.com/photos/nialianne90/36940714816/in/datepost...

I tried to focus on the coffee mug.. as you can see it didn't happen. The camera didn't focus at all anywhere.
23 months ago (permalink)

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Zeroneg1 is a group administrator Zeroneg1 says:

Why are you at half a second exposure?
23 months ago (permalink)

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NiaLianne90 says:

Zeroneg1:

I tried to experiment both handheld and tripod shots. all the same results.

www.flickr.com/photos/nialianne90/36987970241/in/datepost...
www.flickr.com/photos/nialianne90/36987970711/in/datepost...

This one is manual focus
www.flickr.com/photos/nialianne90/36987970881/in/datepost...
23 months ago (permalink)

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NiaLianne90 says:

This is from earlier in the summer. Before I turned off ISO sensitivity....

www.flickr.com/photos/nialianne90/36294142174/in/datepost...
23 months ago (permalink)

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Jim Johnston (OKC) is a group administrator Jim Johnston (OKC) says:

The only time I have ever had this happen is when I turned the af switch off on the camera or lens. I do that when I don't have enough contrast for the focus point I want to use and I do a manual focus.

If they are both on for the camera and all the lenses you have tested with, than you need to send it for repair.

I think everyone is surprised with this one because we haven't seen this problem, or I don't remember it.
23 months ago (permalink)

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Woof. says:

Just a thought... does the camera auto-focus when you press the AE-L/AE-F button?

If so, that means that AF is disabled on the shutter button. Go to Custom Settings f4 Assign AE-L/AF-L button and set it back to AE/AF Lock.
23 months ago (permalink)

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NiaLianne90 says:

Jim Johnston (OKC):

thanks! I will be sending it in for repair.
Yeah, I couldn't find any info with this problem, so I thought it was me. I may not be a pro but I do know how to handle a camera. Kept going back to the manual to check myself.
23 months ago (permalink)

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NiaLianne90 says:

Woof.:

nope. :( I reset all the custom settings for it.
23 months ago (permalink)

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Zeroneg1 is a group administrator Zeroneg1 says:

Yeah send it in.
23 months ago (permalink)

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jan_gaertitz says:

Sorry, I can only recommend to sent it in.
It migth be helpfull for the service, if you provide examples of this fault.
23 months ago (permalink)

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Thiep Van Nguyen Ii says:

Was this ever resolved. I getting same issue. Focus is soft. Mainly with older glass
14 months ago (permalink)

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scovophoto says:

I just bought a D750 about 3 months ago. I am having autofocus problems with my 80-200mm lens. It basically stops focusing. I can remove the lens and reconnect it and then it will work but only for a little while. All my other lenses seem to work fine on the D750. If I put my 80-200mm on my D700 body it works fine. Some weird problem with this lens and this specific body. Very frustrating.
6 months ago (permalink)

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Zeroneg1 is a group administrator Zeroneg1 says:

Is it an AF-S version? If so the AF-S motor and chip would need to be upgraded. There is a known issue with early AF-S models working with the D750 namely the 300mm f/4 D.

www.flickr.com/groups/2682619@N24/discuss/721576478845596...

www.dpreview.com/forums/thread/2005263#forum-post-23566409

Have you tried to clean the pins on the 80-200mm D? Also if it is the AF-S version then once the SWM dies that's it since they no longer make those nor repair them.
Originally posted 6 months ago. (permalink)
Zeroneg1 (a group admin) edited this topic 6 months ago.

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