Road Train !!!!!!!!!!

by Russell McMahon

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8
votes
1answer
264 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)?
4
votes
1answer
160 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
221 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 ...
47
votes
4answers
14k 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 ...