D7000 Firmware 1.02 - Resolved my back focusing

Started May 16, 2011 | Discussions thread
Brendan H
Contributing MemberPosts: 696
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Best homemade test chart
In reply to DeputyPhoto, May 16, 2011

This is similar to the way Nikon test the AF. The 45 deg ruler is there to measure the back/front focus, but you need to be targeting a flat, parallel subject to avoid any errors. If you want to be sure you are perpendicular, prop a mirror up against the target and if you see the center of the lens reflected in the center of the mirror, you are dead on. Forget about those 45 deg targets...

http://www.peleng8.com/how-to-detect-back-focus.html

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