Are autofocus issues common for everyone? *UPDATED*
- Thread starter nightbreath
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Positron said:
I'm using default camera settings, so – yes, Phase detect is the tricky one that I'm experience problems with. Contrast detection works great for me. So should I send camera to Canon?
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You can send your body in to Canon and they will adjust it to spec. Wide aperture primes almost always need MA due to the extreme depth of field.
Autofocus accuracy does vary from shot to shot, but seldom is it so far off that a shot looks fuzzy like the one you show.
Below is a photograph of my laptop screen using FoCal to AFMA a lens. The blue diamonds when stacked represent different autofocus attempts, and their relative accuracy. The software adjusts AFMA from -20 to +20 and takes at least two shots at each point. Notice in the graph, that several blue diamonds are stacked at one point on the left side. The software took additional shots until it decided which point fit the curve best. However, none of those attempts are off far enough to worry about, particularly those where the image is out of focus anyway. The lens is always set to infinity before the autofocus attempt.
The red diamonds are the ones that fit the curve best and likely represent the correct focus. Seldom are two points falling on top od each other, AF is always slightly different.
Autofocus accuracy does vary from shot to shot, but seldom is it so far off that a shot looks fuzzy like the one you show.
Below is a photograph of my laptop screen using FoCal to AFMA a lens. The blue diamonds when stacked represent different autofocus attempts, and their relative accuracy. The software adjusts AFMA from -20 to +20 and takes at least two shots at each point. Notice in the graph, that several blue diamonds are stacked at one point on the left side. The software took additional shots until it decided which point fit the curve best. However, none of those attempts are off far enough to worry about, particularly those where the image is out of focus anyway. The lens is always set to infinity before the autofocus attempt.
The red diamonds are the ones that fit the curve best and likely represent the correct focus. Seldom are two points falling on top od each other, AF is always slightly different.
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Positron said:
Switched to Live View "Quick Mode", focused on the subject and got the same issue. I don't think I could get any difference between "Quick Mode" and default focusing, as mirror goes down when I focus in Quick Mode and there's no difference in focusing mechanism between these options.
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