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yay, I just ordered 2 sets....last night. Guess I better gets some sync cords as well....
Posted 55 months ago.
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this is the reason i saved up for PWs
Posted 55 months ago.
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Hi. My cheap trigger is in the bin now.
Instead I have bought the Elinchrom Skyport.
I use it with my 5D.
I have done some basic testing, and I cannot provoke it to make any noise banding.
Highly recomended!
Peter
Posted 55 months ago.
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bjfphoto [deleted] says:
Gotta remember all that crap from China doesn't pass standards for anyone.
The initial prototype might have.
They are printing the FCC stickers there, why not put them on everything.
Posted 55 months ago.
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I did a shoot yesterday with my 5D and got the banding using unmodified Cactus V2s. Didn't happen on an earlier shoot with the V2s, but I just changed the battery in my transmitter so maybe that's why it happened now. I guess I'm going Skyports or using the old battery. :)
Posted 54 months ago.
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So has anyone come up with a solution to this? Some sort of shielding mod or something...
Posted 52 months ago.
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Nobody seems to have mentioned whether the cameras affected have metal or plastic bodies. Plastic bodies can be shielded from electrical interference as well as metal bodies, but it's not always done well.
An experiment to discover whether this is cable or shoe transmission, or radiation, would be to try the transmitter on an optical trigger, to isolate it electrically from the camera. If that stops it, then all you need is a choke in the trigger connection path.
I'd be a bit worried that a camera showing this effect would also be susceptible to interference from other things like mobile phones, microwave ovens, light dimmers, fridge motors, wifi, etc. etc..
Posted 52 months ago.
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The only thing that has ever made my 5D (metal body) act up are these triggers. I have shot around phones, dimmers, etc. countless times and have not notices a single issue. It would be a good thing to finally hammer down why this happens. I just went to PW's to eliminate the issues which has worked wonderfully. A cheaper fix would be cool however.
Posted 52 months ago.
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Tested my Kuster Modded (With the DIgikey antenna) V2's on my 5D and XTI. The XTI showed no banding or additional noise with or without the antenna. The 5D on showed banding with the antenna and none without. No additional noise. I tried also connecting it to the 5D at a distance of about 4ft using a pc cable. Still the banding appeared, but slightly less pronounced. My advice, if you're using FF, don't mod using an antenna.
The time for Pocket Wizards or Skyports seems to be coming sooner than expected. The question now is which one.
Posted 52 months ago.
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Yet another reason to buy good stuff like PW's as recommended by the strobist himself.
Posted 52 months ago.
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i'll be sticking with cactus for now
Posted 52 months ago.
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Perhaps it's only a canon problem. No prob with my nikon d40 and vivitar285hv with V2s.
Posted 52 months ago.
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Seems it's a 5D only problem.
Posted 52 months ago.
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It happen to my 5D too. My one is 4channels.
Not problem in my 350D
Oh.. my god I just save up for my 5D, now i have to save for PW.....
Here is the photo i shoot yesterday, it happen on the top of the image. I curve up the pic in ps to magnify the effect
Posted 52 months ago.
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im going to mod mine this week and see how it is on the 40d and i will post up my results
Posted 52 months ago.
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So I did a reverse mod on one of my transmitters and fired it with my 5D. Same noise issue on my 5D, but significantly less. There are no issues with my xti with or without the mod. On my 5D I only see the bands on the top after about 60 and it can only be seen in very dark areas with the exposure way up past anything I would normally do. Images are still useable for the most part, but it's one more thing to worry about. So I just put in my order for a set of PW's.
Anyone want to buy a set of modded triggers?
Posted 52 months ago.
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I dumped my ebay triggers ASAP.
They were the biggest lump of poo I've ever had.
Posted 52 months ago.
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Ok, so we know they have issues with the 5D and not with other cameras. fine, does the Choke work? Is there a distance at which we know all the banding dissapears?
Posted 52 months ago.
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I put my trigger about 4ft away and the banding still showed. It was less, but it still showed. It wasn't much different between 2.5ft and 4ft. Don't know about the choke.
Posted 52 months ago.
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yet another reason to shoot NIKON
:D
:)
Posted 52 months ago.
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I have a 5D and mine does ti sometimes but its only a very small bad at the top of the photo for which i crop out in PS. i account for this in my composition but until i get my PW's i'm going to have to live with it :(
Posted 52 months ago.
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I have seen problems on my Nikon d40. It seems a bit erratic but you can see the result here (100% crop):
It happens so infrequently that I haven't done anything about it. The first setup that this occurred it was about a 5% occurence out of 100 shots 5 had the weird noise thing. It seems that it only happens with certain setups. When I use all three of my triggers and they are all fairly close to the camera.
Oh ya my trigger is modded with the antenna.
Originally posted 52 months ago.
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NATEPERRO edited this topic 52 months ago.
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It's probably just a shielding issue. Don't go gluing aluminum foil to the the insides, they have special paint for this, it's used on electric guitars.
Posted 52 months ago.
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modded mine today and did a few tests and so far its looks like there is nothing different (40d)
Posted 52 months ago.
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Hi
I have the same problem with a 30D and Cactus V2 with copper wire pigtail antenna mod.
Posted 52 months ago.
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ironically i see the same thing but it disappears when set my shutter speed to 1/50th using 0110 channel. My transmitter is not modified in any way
1/200th shutter speed > www.pawelmwojtowicz.com/posting/fm/1_200.jpg
1/50th > www.pawelmwojtowicz.com/posting/fm/1_50.jpg
Originally posted 51 months ago.
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thepiecesfit edited this topic 51 months ago.
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I did the mods on mine with the 433 mhz antenna. No problems at all on either XTI or 40D.
Posted 51 months ago.
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I'm getting some (they are in the mail) but I shoot with a D80 & D200 (so likely no problem with interference).
However, it sounds like people having the problem (5D especially ) are using multiples of these receivers. Could the signal be daisy-chaining off the receivers causing this problem? Thus the mod is amping up the disruptive signal.
An interesting test for the 5D is to take a series of shots using one, two, three... receivers at a time (remove the others from the room and turn them off) and see if that effects your banding issue. Make sure to cycle though receivers as it may only be 1 that is causing the problem. If all the pictures have the same amount of banding then it is the transmitter causing the problem.
Posted 51 months ago.
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Tesseract its definitely not a receiver problem. I shut all mine off and fired a regular shot with no strobes. The transmitter still did that band at 1/200 , clean at 1/50th. By the way like I said my transmitter is not modified.
Now the question for anyone is why the shutter speeds have an effect?
Posted 51 months ago.
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ArTee Photography [deleted] says:
A lot of the issue could be the camera, itself, after all what everyone is describing in this discussion is noise. I've had similar weird banded noise in my old D-Rebel long before I had any inkling about off camera flash and I've noticed in everyones complaints some other things that they all have in common. Almost all of those things could. by itself, cause a noise issue, let alone in combination with the other settings (High ISO, faster shutter speeds, etc) Noise is heat and I'm thinking that the noise is there whenever the other elements are present. When you add the ghetto triggers to the mix, the noise gets amplified to a point that it's visible. I have even had similar patterning appear in my Eos 1Ds. Noise is what it is. I doubt that any camera damage is going to occur and it can be dealt with in post.
Posted 51 months ago.
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I've used the triggers a couple of times over the past two weeks with my 5D, at fast shutterspeeds too, and I haven't noticed a thing. I'm still getting PW's though, but I'm glad I've managed to skip the gap between getting a 5D and getting PW's without seeing the banding. Mine aren't modded, though.
Originally posted 51 months ago.
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madelien edited this topic 51 months ago.
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twade1photography , I don't think so . Since its dawn there have been many reports of poor shielding on the 5d. The patterns in the images are representative of Radio interference. You can find plenty on google that shows what that looks like RF. This is not camera noise or anything amplified at high ISO. It is clear at iso 100. So its definitely not noise.
Originally posted 51 months ago.
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thepiecesfit edited this topic 51 months ago.
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ArTee Photography [deleted] says:
thepiecesfit, You can still have noise at 100 ISO! It depends on whether or not the frame is properly exposed! There is noise at every iso including 50, it's just not as noticeable as it is a higher iso's, so while you may be right, don't be fooled into thinking that you're safe from noise because you're shooting at 100 iso. I was postulating just like everyone else in the discussion. There are no hard conclusive facts here at all. There is, at best, a statistical correlation, but nothing that is truly cause and effect here. How do you know that they're representative of RF interference? You've done much more reading on this than I. I'm basing my theory on my experiences in electronics (25+ years of avionics experience and you may have even more). The RF generated by the poverty wizards isn't digital, it's an analog signal, therefore the pattern, since it is a pattern, I would think, is being generated by the digital device. If it were generated by an analog device, my guess is that it would be more random in it's appearance. So I'm guessing that the triggers are enhancing a phenomenon that is already present in the image, it's just not prevalent enough to be seen without the assistance, if you will, of the triggers. Again, just my 2¢ worth. Please enlighten me if you have information that would suggest otherwise. I hope this doesn't sound condescending, because it is not intended to be, it's just difficult to express tone of voice and other cues in a forum.
Addendum: On the subject of noise, take an image that appears to be noise free and either adjust the overall exposure or adjust the fill light until you're pushing the exposure and you will see noise. That adjustment you made isn't adding anything to that RAW file. It's merely enhancing certain parts of it. I was shooting last night at iso 100, in the studio. I was not lighting the background. I wanted it to fall off into gray or black. My sensor was dusty, so in post, I was removing the dust and what did I see in the shadows and on that dark background? All kinds of color noise. I ran them through my noise ware and it took care of it, but it was there. Had I printed them without removing it, I would have been disappointed.
Originally posted 51 months ago.
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ArTee Photography edited this topic 51 months ago.
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ArTee Photography [deleted] says:
This was shot at iso 50 1/250th and f7.1
As you can see, there is color noise in the mid-tones of my daughters hat.
Here a link to the metadata
www.flickr.com/photo_exif.gne?id=2337779289
Posted 51 months ago.
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i just ordered the cactus setup a few days ago and it was before i saw this particular discussion, i have a canon 30d, and i was wondering if this banding has occurred on that particular body.
also, this is kind of the wrong way to go about trying to fix this problem but i was wondering if the banding is just an inconvienence or if it is something that is fixable in photoshop or if it ruins the photographs, im rather experienced with photoshop and can fix quite a bit of noise and interference issues,
i mean i guess i shouldnt have too high of expectations considering the cactus setup cost $38.00 shipped...
i was wondering if somone could post a normal photo taken with the triggers in raw , not scaled down to give me a rough idea of what the banding looks like straight from the camera, to give me an idea of what i might be dealing with,
thanks....
Posted 51 months ago.
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So one buys the cheapest of the cheap, then modifies it by sticking wires on it, then complains about it not working or causing interference...errrm...yes? Would you do that to your microwave oven? What would you expect to happen then? :-)
As for me, I just ordered a set. Yes, PW are nice, yes Skyports are nice but for £30 (a trigger and two receivers) I get what the PW need £450 to give me or what the Skyports need £200. I don't do this professionally, so I can live with any interference, although I've got a D2H which has an LBCAST sensor, so we'll see if it has problems with this.
Oh, and if your camera is acting up due to interference, do not fear, take a chill pill and be safe in the knowledge that it is not going to explode or burn or die because of it. You might get a corrupt image or two when firing the triggers but that's it. You're not actually putting it in a microwave oven.
Originally posted 51 months ago.
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Panos Voudouris edited this topic 51 months ago.
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I just used the cactus triggers with my d50 and have got severe banding with each photo. Has anyone else tried using a sync chord such as the sc-29 with the transmiter to see if it corrects this problem. sorry if this has already been discussed.
Posted 51 months ago.
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Anyone getting these problems with the Pentax K10D/K20D?
Sounds like I might just wait for those radio popper jr's.
Posted 51 months ago.
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This is a interesting phenomena, no one has had any issues about cactus triggers and noise until someone mentioned it. I will have to consult with a psychiatrist about that one! Electronic noise is a fact of live and some instruments are more effected by it then others, but I find it a bit far fetched to blame the triggers for this issue. This triggers have been out on the market for quite some time, how come this is showing up now? I'm a happy user of several of the 16 channel triggers and have not had a single issue with them.
Posted 51 months ago.
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no issues with the 40D
Posted 51 months ago.
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alfredk - This thread was started in 11-2007 so the issue is not new at all. I own the 16 channel triggers and experienced this with my 5D on a shoot. I do know what I am doing and I do know how to troubleshoot and the problem was with the triggers no doubt.
I, like I am assuming most others, did not post anything about it right away because I found a work around. when I saw this thread I added my experiences at that time. My choice for solving the problem was to get Pocket Wizards, guess what not a single banding issues in the thousands and thousands of shots taken since. Maybe your psychiatrist had something to do with that? :)
If they work for you great, they did not work well for some and the issues are present and real. Ya see this is why these threads exist so we can all learn from one another, much better than a bunch of 16 trigger users not having any idea as to what can be causing the problem. Cheers!
Posted 51 months ago.
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Definitly an issue with the 5D. Even if I use the cable to connect it.
Posted 51 months ago.
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I've used mine couple of times in my 30D. It's not modified. I haven't had a problem. It would be interesting to see if the banding continues on all the various frequency set ups. Have any of you with problems tried changing the frequency code? I wonder if one can put some shielding between the trigger and the body.
Posted 51 months ago.
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Banding happens with all 4 channels.
I even HAD to search for a channel NOT firing my 430ex continously.
Posted 51 months ago.
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I also get banding on my new d300 at shutter speeds faster then 1/250 (which i didnt on my d70) using my universities infra red slave trigger that comes with their elinchrom flash kit. I have also noticed that the trigger wont fire unless the back of the flashes are pointed towards the trigger, which is annoying if i wish to use direct light facing the subject.
Posted 51 months ago.
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5d body: $2200
V2s Triggers: $32.95
I see many people posting in this thread who have 5D bodies and are fretting over problems with $33 trigger sets. This singular fact really confuses me.
For shooters just starting out, I can understand the appeal of ebay triggers. For anyone who even occasionally shoots for money, however, why would you even entertain the possibility of this banding problem (not to mention the questionable triggering reliability) while shooting on assignment?
I know this suggestion does nothing to advance the discussion here, but consider: You could probably sell your 5d body for, say, $1600. You could put $1100 toward a 40d and use the other $500 for a three-piece set of you-know-what's...
Just an idea...
Posted 51 months ago.
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atrei the banding is due to flash sync speed of D300 is 1/250 and the flash sync of d70 is 1/500, since it does have electronic shutter.
Posted 51 months ago.
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The brand new D300 has a 250 sync and the old d70 has a 500 synch? That's surprising...
Posted 51 months ago.
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gibby -
different cameras have different strongpoints. The one major cool factor regarding the d70 and Strobist was the 1/ 500 sync speed.
It has to do with the differences in shutter actuation. In fact, the d40, a consumer level camera, syncs at 1/500 as well.
Posted 51 months ago.
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Amazing...
Do you happen to know of any equivalents in the Canon sector?
Posted 51 months ago.
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I would say just hit up canon website and look for sync speeds.. or a canon flikr discussion..
but make sure you're not looking at FP Sync.. which on most nikons is 1/4000, or higher.. i'm not really sure how this works.. but it is not the typical sync speed.
Posted 51 months ago.
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The 1d is the only canon DSLR with an electric shutter and CCD sensor
Posted 51 months ago.
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FP sync simply keeps the flash on for a full 1/250 of a second (the time taken for the moving slot to cover the whole frame) rather than the normal 1/1000 or so burst when the full frame is uncovered. The downside is that the flash power is now affected by your shutter speed (if your shutter speed is such that only 1/10th of the frame is uncovered at any one time - somewhere around 1/2500 - then your flash power goes down by 1/10th). It's actually a bit worse than that because the tubes aren't as good with long bursts of light.
I do wonder why electronic shutters aren't more common though ... I wonder what it actually looks like - do the d50/d70/1d also have the conventional sliding window shutter as well as the electronic shutter?
Originally posted 51 months ago.
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Psinewave edited this topic 51 months ago.
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@gibbygoo: Two points:
1) Why should you pay 10x the price, if the cactus things will also do. For many people they do quite well (after the antenna mod)
2) Comparison is somewhat flawed: Since it is about flash compare it with the price for a flash: and they rage from somewhat less than 100$ to e.G. 400$ for a 580ex, which is considered far to expensive in the strobist community. And one Pocket Wizard (the ceap one) is 188$. Therfore about doubling (trippling for the ceapest vivitars) the price for the flash.
and one extra point: The 5d is the CHEAPEST full frame body ...
Posted 51 months ago.
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As to why PWs get more range w/o causing problems:
I'm fairly certain PWs operate at 2.4 GHz. Also, I'm pretty sure they use a more sophisticated modulation scheme than the Cactus triggers' on/off keying.
As to cameras in high-RF environments - Party of my job involves EMI susceptibility testing, and it takes a LOT of EMI to cause permanent damage to electronics unless there is some weird design flaw in the device in question. (The symptoms I see here are not in this category). Working with cameras in an EMI environment is not fun - At work we often have to point a video camera at the product under test. Even when we wrap a video camera and its power supply/signal cables in foil we get lots of noise in the video when we turn our transmitters on for testing.
As someone else mentioned, there is a good chance that the interference is being conducted through the sync port/cable between the transmitter and camera. Depending on the nature of this conducted signal, putting a ferrite choke (Radio Shack sells ferrites) on the cable might help. It won't help for most PC cables though, as those are coaxial cables, and a choke on the outside of the cable wont' affect signals on the center conductor. You'd need to come up with some sort of filtering scheme. (perhaps a small capacitor across the sync leads inside the cactus?)
Posted 51 months ago.
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I haven't read this thread in a while so excuse me if I'm saying something that's already been said.
I used to get interference on my 5D shooting with 16 channel Gadget infinity ebay triggers all the time so I switched back to optically triggering my strobes.
But a couple of weeks ago, I was in a situation where I had to shoot w/ my GI triggers again and the interference was gone (using pretty much the same settings as before) 3-4 shoots later using the ebay triggers and the interference still has not shown up. Very odd, I'm thinking it has something to do with antenna placement or something very subtle that can change pretty easily.
Also worth noting... A month ago or so, I tried to shield the RF signal from reaching my sensor by opening the trigger device that sits on the hotshoe of the camera and putting aluminum foil on the bottom of the internals. after doing that, the entire frame of my image was all crazy with interference like in Jason Chan's image above. After removing the foil though, the interference was still there, but just in a very small band at the top like before. Not exactly sure what this means, but it's quite easy to change the interference patterns caused by the triggers.
I don't think it's batteries because I tried 3 different sets of batteries with the same results in 3 seperate triggers before.
Posted 50 months ago.
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I was shocked when I read this thread. I just tested mine, 400D, 1/200sec shutter, ISO 1600. Modded Trigger, Adjusted levels in photoshop. I dont see any interference.
Also had a quick look at my previous shots. I don't see any interference. Oh, and I have the new Cactus V2s.
My mod is here:
www.flickr.com/photos/25797462@N07/2429504694/
Posted 50 months ago.
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i had this happen to me today! i was hand holding an sb28 off to my left while i was shooting. and I had a frame today with really bad noise banding at the bottom of the frame! I cant even open the file in photoshop, it says it can't read the file.
I have been using my triggers for many months, maybe about a 6 months now. I have never had any problems and have been extremely happy with my triggers. Never had any problems with them. until now.
Originally posted 48 months ago.
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dmldl123 edited this topic 48 months ago.
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i just had probs... only noticed when i opened the wedding files! it happens when im using a sync cord and a flash on the cam...
Posted 48 months ago.
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I never have noise problems when I get a successful frame capture. However, sometimes I will take a shot and my flashes won't fire, and when I look at the capture, it's black with a vague outline of the actual subject in this red, pixely noise.
I have a Pentax K100D, so it's possible it's some other bug in the camera - I've read various things about vertical pattern noise in the K-series.
Posted 48 months ago.
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Okay guys, here's some good news. (after the jump)
As you can see from one of the four pictures in my photostream I had this huge a** antenna on my transmitter.
Recently I did a group shot, which was a little underexposed. But "no worries" I thought, "I can fix that in raw later".
Would have been no problem pulling up the EV in RAW, but then the banding became visible.
So I took the huge antenna off.
I used a dremel to cut in part of the circuit board and isolate the horizontally mounted onboard antenna (copper strip).
Futher I soldered in a tiny thin short (about 2 cm= little less than an inch) piece of cable to the original antenna hole on the board.
Banding, especially on the top of the frame decreased dramatically.
_________________________
after reading the whole thread, finally ENTHROPY512 came up with a good lead:
He suspects the interference has not so much to do with the radio frequency but more by the physical connection of the transmitter to the camera (hotshoe or cable).
So I set up 1 Vivitar with the v2s Receiver, and another Vivitar I put on my camera bouncing up. On that vivitar on the camera I put a slave trigger, connected it to the v2s transmitter via a 3.5mm jack and placed the transmitter close to where it would normally sit on the camera.
I did a few test shots with only the on camera flash and I also did some with the additional flash fired wirelessly by the slave triggered cactus transmitter.
No visible banding anymore !
Not that I'd like to run around with this setup just to keep the banding low, but it shows now where to start: somthing needs to come between the camera and the transmitter !
Continuing research...
Posted 48 months ago.
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ive gone back over some other shots and i need to rescue some underexposed shot in raw... i now see the banding in those as well!
hurry up radio poppers!!!
i may just use the 40d for now as i dont think it happens with that!
Posted 47 months ago.
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yeah, me too. hurry radiopoppers, hurry.
I read the blog every two days to see if there's any news - but all I read that they're still in the "Initial testing phase".
I forecast they'll be there around fall.
Try taking some underexposed pictures with the cactus triggers and especially look out for the top of the frame, there should be a ziggy pattern if you push the EV. If not, boy you're lucky !
Posted 47 months ago.
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I thought I was going to have to send my 5D to service because of this banding while using these triggers, so thanks for speaking up here ppl!
Luckily for me (and since I've had to deal with this for a while not knowing it was a known problem) when I use those triggers I adjust my crop accordingly to avoid the issue. Also my banding only happens on 1/10th of the top area of the frame and not as bad as nome have shown here. Glad to know when I get PW's I'l have this issue go away.
BTW: Mine are modded with a screw-on antenna.
Posted 43 months ago.
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No banding for me yet.....400D rulez :D haha
Posted 43 months ago.
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I've read something about this before and it appears (?) to mainly affect Canon... Personally I have never had a problem with mine, possibly because the Sony/Minolta hotshoe is different to everyone elses "standard" ISO connection. I believe the cause is due to no shielding between the trigger and camera hotshoe.
I also saw a post on here somewhere showing a mod to include a toridal filter to isolate the trigger... but do think I can find it now??
Posted 43 months ago.
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I have noticed the effect with my NikonD40, but I'm really not that concerned.
Posted 43 months ago.
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I did the mod with the 433mhz antenna from digi key on my cactus V2s transmitter and have not seen any problems with my Nikon D80
Posted 43 months ago.
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No problems at all on my D200 with my own stock triggers, or using a friend's modded triggers. I did notice that my friend's modded triggers tend to misfire every 10-15 shots or so, whereas my stock triggers fire consistently, barring any loose cables or weak batteries.
Posted 42 months ago.
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i did the kuster mod using 433mhz antenna and nothing....even at high iso and max sync speed of 1/250, nothing...i have tried placing the transmitter at different places on the camera and still no banding as people complain...
my theory is that maybe its not the transmitter or maybe i am just very lucky +]
Posted 41 months ago.
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The D80, D200, D40, and Pentax K10D all use the same Sony *CCD* sensor...
FWIW, I have no problem w/ the "V2s" fleabay triggers w/ a Pentax K20D (Samsung CMOS sensor). No lines and they still sync at 1/180...
Posted 41 months ago.
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I also had the same problem................. i have been searching around to see if there is some way to make it up. After i read the post.....
Its really wierd... Mine has a band on the top of the image. I have tested many things, but in a case where the flash is off but the trigger and reciever are still on, there is no band appearing on the image. if the trigger interfere with the CMOS , it should be appear on the image as well even the flash is off.
I dont know if anyone can come up with a conclusion how this happen....
Thanks
Posted 40 months ago.
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konba,
Are you sure your "band at the top" is not a sync speed issue? set your shutter speed to 1/60th see if the band goes away.
Posted 40 months ago.
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Hi David,
I think usually sync speed band is at the bottom of the image.
And my image's band is like this photo
img.photobucket.com/albums/v244/erykv1/radiointerference.jpg
This is from anothere from mine, but it is the same thing happening to my image. Anyway, i will try at 1/60 and update you guys later..
Thank you
Posted 40 months ago.
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It's happening to me too... I have a 5D (which I was loving) and the new Cactus V4
any know solution?
Posted 38 months ago.
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Solution: Use Pocket Wizards or get a 5dmkii, which does not have this problem, probably because Canon decided to shield the sensor better in the mkii.
I have used the modded v2 and unmodded v4 triggers on my 5dmkii with zero banding issues.
Posted 38 months ago.
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ok, the questions should have been...
anybody knows a solution without having to sell a kidney?
Posted 37 months ago.
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i've been using the Cactus V4 triggers for a few months now. i havent seen anything like that.
last nights shot
Posted 37 months ago.
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Surprise: Modifying the RF output network of a transmitter might cause spurious emissions. Sometimes those warnings have a basis in fact, folks.
Posted 37 months ago.
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Fuck, recently upgraded from a rebel xt to a 5D. now i have the banding at the top of the frame.
stupid pt-04 triggers.
Posted 37 months ago.
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i might be getting cybersyncs and trading in my garbage v2s!!
bu i have never seen the issue mentioned here
Posted 37 months ago.
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All you need to solve the problem is a PC cord to keep the transmitter a bit further from the camera, and an RF choke on the lead. Everyone jumps to the conclusion this is the fault of a cheap radio trigger, but it's obviously the fault of cheap inadequate RF shielding of the RF sensitive parts of the camera circuitry. Those particular cameras will show up similar problems in any noisy RF environment.
Posted 37 months ago.
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Tried with the PC cord and it is not solving anything, the issue is still there. Sent back the Cactuses, now trying to decide what's the best solution.
Cybersyncs?
Posted 37 months ago.
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Is this a general problem with all the cheap transmitters?
or is it only the cactus ones?
Have anyone tested this with the CTR-301(p) and the other types of cheap ones?
Posted 37 months ago.
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Beppe81, the longest PC cord without an RF choke would be no use, the RF just goes up the wire. That's why so many modern connecting cables now have RF chokes as standard, the devices they're attached to can't pass the FCC radio interference regs without them.
And it's not a general problem. Check back on the long discussion thread. It only applies to a few specific camera models (which happen to have poor RF shielding). Most cameras don't show this problem.
Posted 37 months ago.
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I own a 5D which seems to be the most problematic one of them all.
Just wondering why PWs do not show this problem opposed to Cactus ones if its the cameras shielding that is the problem...
So if it's a combination of the two some cheaper models of RF transmitters might still work. We could make a joint effort to make a spreadsheet linking working and non-working combinations of cameras and transmitters.
Posted 37 months ago.
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Chris_Malcolm: just wondering if a very short cord with a RF choke would do the trick? So it might be possible to make a hotshoe adapter that would solve this problem.
ie. would move the transmitter about 1-2 cm from the body and have a RF choke to eliminate the RF through the contacts/cord.
Posted 36 months ago.
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Just bought the V4 (without reading this thread!) and it is a disaster with my 5d. :(
Posted 36 months ago.
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Anyone tried shielding the transmitter from the body?
Posted 36 months ago.
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ive tried foil on the inside of the housing connected to the ground. Did nothing :(
The set of V2s triggers i have are reliable and have great range, but the static on the 5d is not gonna fly.
Posted 36 months ago.
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still nobody found a solution for this?
what are the best alternatives also considering price?
Posted 35 months ago.
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I've been desperately trying to work out what was going wrong with my pictures after seeing this banding and am so glad I came across this thread. I have a 5D and the new V4s. They are 100% reliable and I had been getting on great with them, until I realised they were causing this problem.
So is it the new 5d or pocket wizards I need to convince the wife I need ;-)
Posted 35 months ago.
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Just got V4's on my 5d... wish I saw this topic earlier. :(
Shipping this POS back to Midwest Photo.
Posted 35 months ago.
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I just received my V4's the other day and used them tonight on a portrait shoot for an upcoming book. Didn't discover the banding until I got home and uploaded the images. I'm using with an Olympus E500. I can eliminate the problem by moving the transmitter off-camera using a sync cord, but that kind of defeats the purpose.
Not sure what my next step is, but returning these to Midwest Photo Exchange is at the top of a short list.
Posted 29 months ago.
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Christian Nam Studio [deleted] says:
thread digging... the answer is not buying these. cybersync or pocket wizards.
Posted 29 months ago.
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this may be the solution ?
www.flickr.com/groups/strobist/discuss/72157605977418554/...
has someone tried it on 5D ?
Posted 28 months ago.
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just to inform, i was worried about something like this happening with a RF-602 + Canon 50D
now im over 3000 images, transmitter fixed in the bottom of camera, side of flash, side of camera, ISO 3200, raw pictures, battery mods, wifi antenna mods, and all possible test i can think of, i got no problem whatsoever.
Originally posted 28 months ago.
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Malowz edited this topic 28 months ago.
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I just had this happen on my Canon 5D with the Cactus V4 triggers and was stumped until I came across this forum. I was afraid my sensor was going - glad to realize it's not that!
On the Gadget Infinity website there's a big notice about the RF Banding issue on the Cactus V4 triggers and that they've fixed it on all that have gone out after June 2010 - www.gadgetinfinity.com/product.php?productid=17204. I bought mine before then.
They have a new version out (V5) - I'm assuming they've fixed the banding issue on this too hopefully.
Posted 14 months ago.
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I've used 433mhz ebay triggers for year with 3 generations of Pentax bodies (K10D, K20D and now K5). Thousands of shots, no misfires and no sensor effect.
The foregoing posts suggest strongly to me that the problem lies with Canon cameras, and not the RF units which don't seem to bother any other make anywhere near as badly, if at all.
But then if you have a Canon or two you are already familiar with the '99' error of death and probably a couple of '06's thrown in for good measure ;)
Posted 14 months ago.
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