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Messages - digital paradise

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AI Focus does. AI Servo does not. 

Guys remember designing a work around isn't the way forward, There shouldn't be a need to have to work around a problem that basically should not exist in the first place, Im worried that the problem may start to become overshadowed by "what we all can do instead" I really am hoping for this tread to get heard, its a real problem and I do not believe for a moment it only happens in certain cameras (ie other 5D3's don't have this problem) its a problem with the 5D3 itself and needs to be addressed,

I would like to say thanks to everyone that has of course offered help in ideas making it easier while we wait for answers, but let us not forget the true problem exists and needs to be fixed,


Amen. Band-Aids are never the solution. It is not our responsibility to solve this.   

I too have seen this issue but get around it 99% of the time by using servo focus.  With moving subjects at wedding receptions, this is often the better approach anyway.  You certainly have to move the autofocus point around and can't recompose once locked.  This seems to work better with my sigma 50mm 1.4 than it does with the 70-200 presumably because of the extra light at max aperture. 

My personal opinion is that using servo in this fashion is still much better than the hit or miss focus of my 50d even with the assist light.  It was like rolling the dice with the 50d when focusing with the 50 1.4.

In summary...this issue is painful, but not a showstopper for wedding photography.

You must mean AI Focus. The assist beam does not work in AI Servo. I never use AI Focus.
Wonder how that works? I guess when the subject is stationary it works but when the system detects the subject in motion it does not? I'll have to check my cameras manual.         

This is from this site   http://photonotes.org/articles/eos-flash/index3.html

An important thing to remember is that the AF assist light works only if your camera is in One-shot mode - it will not illuminate in AI Servo or in any icon AE mode which employs AI Servo, such as the Sports mode. This is because the camera is constantly focussing and refocussing when in AI Servo mode, in order to track subject motion.

I am a wedding photographer and have shot 25 weddings and receptions this year with the 5D3 and 600ex.  I started a thread about this issue about a month ago and I finally sent my camera in to Canon to get the shutter replaced and the light leak issue resolved and I specifically complained about it the AF assist beam.  When they sent it back they mentioned they made some "electrical adjustments" to the shutter and AF.  They never acknowledged there was a problem or said that they did anything to fix it.  I haven't shot a wedding since then so I haven't gotten a chance to really test it out yet but I did some quick tests and sometimes there appears to be some improvement.  Other times it still seems slow.  I don't think there is a way to know until I shoot a wedding again.  I do think it is interesting they didn't even acknowledge there was a problem and always say it is the first they have heard of the issue.

Yeah they are probably told to say that until they figure out what is going on. Even if they do a recall would probably be too expensive if firmware can't fix it so they may never say yes it is an issue. We will have to keep up to date on your findings and posts.  Only a few times I can remember a recall.

At Canon Forums but one person sent it in an Canon told them it was due to dust in AF sensor. When it came back it made little difference.   
Thanks for your help. 

EOS Bodies / Re: 6D vs 5Diii vs 5Dii - Speedlite AF Focus Beam Assist Tests
« on: December 12, 2012, 11:10:41 AM »
Someone stated this is not working. Images are OOF. It may be on Canon forums. I have to say. I keep testing this and it and I think it is working.

Only time it takes an extra second is when I really put the lens OOF on purpose. It takes second the the USM to bring it home. Even them my shot was in prefect focus.

I'm going to continue testing this. I have not gone live with this yet. More tests from other people would be helpful.

I just thought of something while writing this. I had also read that the first time on a new subject the AF assist would take 3 times but then once achieved it was quick. So if unsure off AF consistency do the full press for the first shot then half press for subsequent shots. I'm going to try it out.

This may be an excellent "temporary" solution but I'm still won't be thrilled about changing my shooting style.         

There must be 5 threads on this subject :)

I'm getting mixed results. Lsat night I threw my 600 on my 7D and it was pretty much normal. Then I put it on my 5D3 and I was getting great acquisition. Just about the same speed as my 7D. Tried again this morning and was good again. Last week it took 3 blinks to achieve focus quite a few times.
I'm testing both with half pressing the shutter and a full press. The full press is instant (before AF beep goes off) and I'm find all my images are in focus. 

EOS Bodies - For Stills / Re: Am I the only one without 5D3 Problems?
« on: December 11, 2012, 01:25:40 AM »
I just read at Canon forums someone tried that pressing the shutter all the way method did create OOF images.   


Canon technical support told me that the AF assist beam is not supported with this combination (5D3 and 600ex)

I'm still trying to get over this. I may have to call Canon myself.

EOS Bodies - For Stills / Re: Am I the only one without 5D3 Problems?
« on: December 11, 2012, 12:52:22 AM »
You have basically summed it up. There is a learning curve with the AF system. Seems to me the biggest two complaints are the black focus points and AF assist beam.

When you turn them on they will illuminate when you achieve AF or you moved them around but will not stay lit. Active AF point/s staying lit would be a nice feature.

Seems to me the biggest complaint around is the AF assist beam. The 580 flash and my 5D2 was instant. There is a delay with the 600 and 5D3. It seems to pointing at the AF squares are smaller on the 5D3 as compared to the the 5D2. Some one did some tests (I'm not sure here or at Canon Forums) by pressing the shutter down completely. When AF is achieved the camera fires before the AF acquisition beep sounds. It is faster and so far looks like the images are in focus. I would not try this live unless you get your key shots first :o         

The AF in general is great IMO. Upgraded to the Canon RT system and I'm also really enjoying it. I don't miss transmitters, receivers, cables, etc.

I also purchased a ST-E3-RT and made it more portable.

Nice to write up for an ex Nikonian. Welcome.               

The 600EX-RT flashes are basically the same as a 580's. Only difference is the RT. The 600 is still optical capable to fire slaves or to be a slave and be fired by 580 master. The menu system which is a little different than the 580 and far better as far as I'm concerned and would be very easy to use and adapt to while reading his book. Syl has a video and there are tons of them on You Tube explaining how it works. Syl is all about creating and shaping light and shadows which is universal to any flash.

Speedligthers Handbook is very good. Gives you a good foundation. I'd read it first them explore several of the other books suggested here. I myself did not read them but have heard a lot of good things.

I'll through in another source - my flash guru. This is why I have not read other authors. Got started here and decided he gave me everything I needed.

Blue column on the right. Start at 01 - natural looking flash (under flash photography techniques).


His book is very good as well.


I did not read this one but my guess it is very good based on his other stuff.


Lighting / A little mod I came up with
« on: December 09, 2012, 01:44:11 PM »
Using the ST-E3-RT is wonderful. Before going Canon RT I had a transmitter mounted to my Sekonic L-358 and fired my flashes via a receiver on the camera. That all changed with the Canon transmitter.

I now use Auto Reset Cordless Flash mode on my L-358. Carrying around the Transmitter was a pain when I needed two hands. I cut a spare mini stand (the one that comes with a flash) down to size and attached a spare Black Rapid connector. It now hangs from my belt or belt loop and I make all the adjustments at location. When done I just pop the transmitter on the camera.

This is my second mod. It was hard to lock the foot on the generic mini stand and I did not want to wreck the rubber seal. I cut up the foot that came with the flash and ordered a new one from Canon.

Lighting / Re: 580ex II advice
« on: December 08, 2012, 06:28:07 PM »
I'd spend the extra $100. RT without additional triggers, etc is wonderful. May as well think of the future.

But be careful - you will get the bug. First the ST-E3-RT and then next another 600 RT (if they don't release a smaller RT one).  :P   

I am wondering about this. Even if Canon discovers an issue or knows about it how would they fix it? It appears to be a too small of a focus point, too large of a focus beam/grid or both. Can you do something about the focus points with firmware? I know little about the mechanics of that. Is that not a hardware issue?         

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