Open

by damned truths

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

Take the 2-minute tour ×
Photography Stack Exchange is a question and answer site for professional, enthusiast and amateur photographers. It's 100% free, no registration required.

I know that sometimes a lens/body combo needs to be micro-adjusted to attain ideal focusing behavior, and that this is usually because of sample variation, but which parts of the lens and/or body are actually the primary causes of front/back focus?

share|improve this question
    
"must"? No. Definitely no "must". In some cases needs to be is the better answer. Also maybe see here, the answer is "both": canonrumors.com/tech-articles/this-lens-is-soft-and-other-myths –  DetlevCM Sep 10 '12 at 13:55

1 Answer 1

up vote 3 down vote accepted

It can be any number of different things. It all comes down to the tolerences that consumer cameras are built to.

Typical suspects would include:

  • Lens Element locations
  • Flange-to-film distance
  • Sensor location
  • Focus sensor

It is all about the location of the focal plane as outlined here: What is back-focusing?

share|improve this answer

Your Answer

 
discard

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.