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07-26-2013, 04:36 PM   #1
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k-5 auto ficus adjustment

My wife says it is my eyes but I think it is the camera. Anyway if I want to adjust my auto focus what type of object should I shoot to use as the subject for the post adjustment testshots. Something that is complex in texture or something simple? I have three lenses - a DA 18-55mm a DA 50-200mm and a DA* 300mm.

07-26-2013, 04:53 PM   #2
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Ideally, you should use one of these tools:

Fixing Front and Back Focus - Introduction -

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07-26-2013, 04:57 PM   #3
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Hi resolution test target printed on glossy paper. Use a tripod and remote.

AF fine tuning is not a magic bullet. Often the margin of error in a test is larger than the original error. Without a tightly controlled precise test AF fine tuning is just a great way to mess things up even more.

Set up on a tripod, the camera and target must be perfectly aligned both vertcally and horizontally. If the alignment is off at all you can easily makes worse. Take multiple test shots at least 5 after each change.
07-27-2013, 12:01 AM   #4
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I shot a plain cement walkway that had a crack with some grass in it to focus on. I shot wide open at about 5 ft away, and the zone of focus was easy to see.


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