Tagged Questions
8
votes
1answer
178 views
How do repair shops fix focus shifts on bodies lacking focus microadjustment feature?
For camera bodies without autofocus microadjustment capability, how do repair shops calibrate a specific body and a lens combination suffering from the focus shifts (back and/or front focusing)?
3
votes
1answer
96 views
What factors influence whether a lens and camera combination front or back focus?
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 ...
6
votes
1answer
188 views
Does backfocus/frontfocus change?
I have adjusted the back-/frontfocus setting in my camera for different lenses.
Now I am wondering if I have to readjust the lenses regularly? Does the back-/frontfocus for a lens change much over ...
12
votes
1answer
6k views
What do “Frontfocus” and “Backfocus” mean?
I've read those terms in a couple of lens reviews, and not even Wikipedia has an article about it.
So my questions are:
What is back/frontfocus?
What causes back/frontfocus?
Is there any preventive ...
43
votes
4answers
9k views
What is the best way to micro-adjust a lens?
I have a Canon 7D with a 50mm f/1.4 lens, and I think the auto-focus of the lens is off. How can I test and adjust this reliably?
Will this approach work with all of my lenses? If I had a different ...
