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06-21-2015, 11:54 PM   #1
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AF.C on K-5 II vs K-3

Here are two pictures from an event in Sandnes, Norway. I used my F*250-600/5.6 on all photos that day, but started with the K-5 II and ended with my K-3. Later when I was home and had a look at the pictures, I saw that most of the ones I took with K-5 II was unsharp. K-5 II struggled with AF.C and was not quick enough to focus before I took the picture. I use focusing with the AF button and does not have focus activated on the shutter release.
With the K-3 things got better. K-3 is faster to lock focus before first photo in a series and is also more capable to hold correct focus with AF.C. It is not perfect, but better than K-5 II

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When using AF.S, it is the other way around. I find K-5 II to be more accurate and consistent than K-3. K-5 II nails focus most of the time, but K-3 is sometimes front focusing and sometimes backfocusing in perhaps 10% of the images with the other 90% good to very good.

06-22-2015, 12:26 AM   #2
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both links show the same pictures, taken with the K-3
06-22-2015, 09:57 AM   #3
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Yeah, I'm not seeing a series of photos from the K-5 either. I'm just seeing finding thee nice shots from the K-3.

The one shot of the guy popping his head up from the muddy water looks like it is backfocused on the pipe structure, but that would be a pretty challenging shot given how fast he was moving, and how his face has almost no areas of strong contrast, given that it's all covered in muddy water. Focus may have locked onto the contrast between the edge of his head, and the orange pipe.

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