Before the rush

Before the rush
by evan-pak

Submit your Photo
Hall of Fame

Please participate in Meta
and help us grow.

Photography Stack Exchange is a question and answer site for professional, enthusiast and amateur photographers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I noticed that some of my lenses auto-focus more accurately then others. (Assume perfect light conditions and fast shutter speed) Zooming-in on say the center focus point (if only the center focus point has been used) sometimes reveals that the lens overshoot or undershoot the focus just ever so slightly. I also almost always get a better and sharper image when focusing manually (and breathing correctly). I mean the autofocus is not bad (seems best on my prime 50mm lens, less perfect on my 70-200mm telephoto) but not perfect.

I might now be thinking this up as I write along but If I remember correctly I've read somewhere that the Canon 50D body has some kind of an feature that can fine tune the AF for differently for different lenses.

In the end I decided to go with the Canon 60D body. My question is: Is it possible to somehow calibrate the auto-focus with my body to perform more accurately?

share|improve this question
For cameras which do have the adjustment feature, see this question: What is the best way to micro-adjust a lens? – mattdm Aug 16 '11 at 19:31
@mattdm - does the solution in this question also apply to the 60D or is this specific to the 7D. It says "If the focus changes, dial in microadjustment in the correct direction and repeat." How? – Jakub Aug 16 '11 at 19:49
As @rfusca notes in his answer below, unfortunately the Canon 60D does not have the micro-adjust feature. This is one of the things they dropped from the 50D, apparently as part of an overall strategy to position the line as an upgraded Rebel rather than a cheap semi-pro alternative to the 7D. – mattdm Aug 16 '11 at 19:57
up vote 7 down vote accepted

You adjust focus on the camera - not the lens. The Canon 60D does not have a micro focus adjustment needed to do this.

You may try sending in your camera and lenses in for adjustment together, but it is not something you can adjust yourself on that body.

If your 70-200 is significantly slower in max aperture than your 50mm, then it likely doesn't autofocus as well because of the slower aperture. More light = better autofocus.

share|improve this answer
Canon does not make a 70-200 f/4-5.6. All of the 70-200's include the "L" designation, which by most accounts can also be termed "professional", not consumer. – dpollitt Aug 16 '11 at 19:19
Oops, you are correct, was thinking of the 50-200 for Canon. Corrected. – rfusca Aug 16 '11 at 19:23
Hm. That's probably the case. the 50mm is f1.4 and the telephoto is f/4. – Jakub Aug 16 '11 at 19:41
f/4 really isn't too bad - its no 1.4, but its not like its f/6.3 . You may try using a focus test chart in bright light just to verify. – rfusca Aug 16 '11 at 19:47

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.