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Third repair attempt fails

bkinthebay

bkinthebay, BE
409 posts

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"RE: Third repair attempt fails"

bkinthebay Registered since 27th Feb 2010
Wed 30-Jan-13 02:16 PM

>I think Bernard's efforts are quite interesting. The problem
>is that I can use his target method to fool a Canon 5D, Canon
>T3i, Canon G1 X, Fujifilm X-Pro 1, Nikon D700, D5200, D7000
>and a D800 into consistently front- or back-focusing. It
>leaves the impression that the AF in each body needs fine
>tuning. But when I check the same cameras using the same
>lenses shooting a known-flat chart that is mounted parallel to
>the plane of each camera sensor, AF becomes consistently
>accurate. How much physical bias by the photographer at home
>doing such testing figures into this sort of DIY effort is
>another unkonwn factor, but a variable still. With a
>less-than-optimal parallel/plane test target I can also force
>AF inaccuracy.
>
>
Hi Howard,

Could you explain how do you manage these bodies, properly adjusted, to poorly focus on the test chart using the procedure I described? That way, I can maybe workout a better one . It would be great if you could post an example,maybe in the original thread not to pollute the current one...

Regards,
Bernard.

This is a hot, active topic! Third repair attempt fails [View all] , johno Silver Member , Tue 25-Dec-12 02:58 PM
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