Quick Guide to Accurate EOS Autofocus

[Sonny]

Canon has published a PDF: The Quick Guide to Accurate EOS Autofocus. It's a 2 pager that explains how to use the Autofocus on Canon cameras. It's not just the the Canon 7D, but also applies to the 5DMk2, 1D serie… I love how they use the word accurate. But the vast majority of the focusing problems are related to the wrong understanding/usage of the autofocus.

The most surprising was the importance of the Viewfinder Diopter Adjustment.

Canon Digital Learning Center (PDF)

[RexGig]

There are plenty of folks who need to read this one. Many do not "get" why focusing and recomposing does not work well when shooting at wide apertures, and the text and diagram explain it well. I learned early not to focus and recompose with something like a wide-open 50mm 1.2L, but now I have a reference to help explain it.

I like the beautifully simple explanation of micro-focus adjustment. One method I had previously bookmarked required tethering the camera to a computer more advanced than anything I presently own. Thanks!