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07-26-2013, 02:52 PM   #16
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Now this is interesting.... I compared the auto focusing accuracy of my new K-5II to the K-5. Below are 100% crops using the K-5 (top) and a K-5II. The K-5II focused perfect right away. The K-5, I tried -5 and +5 fine adjustments, refocused a couple of times, and could not auto focus correctly at this larger distance. Before my K-5II purchase I thought optics of the lens was a limiting factor, because it seemed pretty sharp close in. But now I am wondering what is different about the new K-5II auto focus that improved the auto focus accuracy. It definitely does much better in low light. but I don't understand this difference. I am satisfied with my current 50-500mm with these results... (both photos 500mm, 1/640s, f/6.3, ISO 400)

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Last edited by Eric Seavey; 07-26-2013 at 03:06 PM.
07-27-2013, 06:34 AM   #17
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Eric - I've seen similar results going from a K-5 to my K-5IIs. Hard to explain, but very happy with the upgrade!

I went through months of testing all my lenses for AF adjustment with my K-5 only to partially come to the conclusion that my K-5's AF would "float". I would get the AF adjustment for a specific lens just right, but then after a few shots it would seem to get slightly off. Then it would be OK again, and back and forth. With my K-5IIs, I've not had to do any AF adjustments for any of my lenses - all super sharp right out of the box so to speak.

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