Problem with focus on new canon EOS 650D?

Started Jan 22, 2013 | Discussions thread
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WilbaW
WilbaW Forum Pro • Posts: 10,758
Re: Problem with focus on new canon EOS 650D?

MAC wrote:

post your chart for me to download and print and tell me how far away to position my 50mm on crop and I'll consider shooting it at F1.4

Target = A4 (letter, whatever), portrait orientation, top half white, bottom half black.

Set up target parallel to the image sensor (use a mirror for alignment), at 50f in good light. Calibrate slanted scale with CD AF. Compare with PD AF, ten shots each way, pre-focussed at infinity.

Tilt target 45 degrees and repeat.

Bonus points - if you use a horizontal line rather than the above, how thin can you make it and still get consistent confirmed focus?

What do Nikon say?

?

??

???

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