I bought my 5D MK III in early June. I haven't shot a ton of stuff yet - maybe about 2000 frames over 7 or 8 sessions. But in 3 or 4 of those sessions, AF just quit. I use back button focus and at some point in the session, I hit the AF button and....nothing. No lens movement, no light, no beep, zippo. These situations have all been in good light conditions. The only way I cleared the system and reestablished AF functionality was to power off the camera and then power back on. I don't typically shoot time-sensitive stuff like sports or weddings where I have to worry about missing "the" shot. But I'm still concerned about this hiccup. Anyone else seeing this anomaly?
5D MK III Focus Hiccup
- Thread starter gbchriste
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I've had this exact problem with Firmware 1.13 on the first day I owned the camera. No lens movement ... nothing... no response at all. This was both with shutter and back button focus. I forget how I ended up fixing it if I removed the battery or changed the to/from AI servo etc... I fiddled with everything trying to get it to work again.
I've yet to duplicate the problem.
Of note: whenever I hit the back button or the shutter it would flash "M focus" on the LCD suggesting that I had the lens in manual focus mode (which I most certainly did not). Plus, if I had it in manual focus mode the shutter/mirror would have actuated, instead the camera simply refused to function as if it couldn't lock focus (but of course it wasn't even trying to focus).
I've yet to duplicate the problem.
Of note: whenever I hit the back button or the shutter it would flash "M focus" on the LCD suggesting that I had the lens in manual focus mode (which I most certainly did not). Plus, if I had it in manual focus mode the shutter/mirror would have actuated, instead the camera simply refused to function as if it couldn't lock focus (but of course it wasn't even trying to focus).
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J
Jared
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I've encountered this peculiar and bothersome anomaly myself when shooting portraits - I too use the AF-ON button to isolate my metering and AF. I've never seen something like this after having shot with a 40D, 2x 5D2's, and a 1D4 over the course of 5 years, but I thought I was doing something wrong/going crazy! The problem seems to present itself when I least expect it and in good lighting conditions too.
Will you go down the track of sending the camera in to Canon? I may do the same when time permits.
Good luck!
Will you go down the track of sending the camera in to Canon? I may do the same when time permits.
Good luck!
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My shutter out is around 9k and I always shoot with AF-ON. Have not come across this issue yet but I'll keep an eye out for anything out of the ordinary.
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gbchriste said:
Is this phenomenon happening with just one lens? Or across different lenses? It may not be the body at all.
I have a 20K plus actuations 5D3 with no AF problems so far. Mind you I did have the shutter replaced at around 2K actuations but this is irrelevant to the AF matter you have described.
-PW
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I'm having occasional problems with my 5D2, same thing.
I'm almost positive its the CF card. Take out the card, reseat it, and its good to go again. I've got my camera set for being able to shoot only with the card in place. Next time it happens, I'm going to change the setting before I reseat the card... see what happens with that.
I'm almost positive its the CF card. Take out the card, reseat it, and its good to go again. I've got my camera set for being able to shoot only with the card in place. Next time it happens, I'm going to change the setting before I reseat the card... see what happens with that.
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Some months have passed but I purchased my 5D Mk111 in March 2013 and have experienced the same problem as the original poster, takes a few shots then freezes as though it does not recognize the lens, focus away from the subject (takes 3 - 6 attempts) then works for a short while.
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