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<blockquote data-quote="Marcel" data-source="post: 570502" data-attributes="member: 3903">Paul, the exif I see says 1/1250s. not 1/250.I don't know if these are straight out of camera jpegs. If they are, maybe the sharpness in camera's settings could be bumped a bit. But, all lenses NOT being equals, I've read comments from several people that stated that their Sigma was not that sharp longer than 400mm, and that there was much quality differences between samples.Is this behavior new to you? Have you tried the same lens on another camera with same results? Can you get better results with another lens or another camera?There are too many variables here for me to diagnose your situation. You should see about post processing sharpening. I suspect that you probably very well be happy after finding the proper sharpening tools. In the case of the osprey, it's in the shade and the flat light fill-in doesn't help sharpness at all.So, keep trying and I hope you'll find a solution to your problem.</blockquote>

[QUOTE="Marcel, post: 570502, member: 3903"] Paul, the exif I see says 1/1250s. not 1/250. I don't know if these are straight out of camera jpegs. If they are, maybe the sharpness in camera's settings could be bumped a bit. But, all lenses NOT being equals, I've read comments from several people that stated that their Sigma was not that sharp longer than 400mm, and that there was much quality differences between samples. Is this behavior new to you? Have you tried the same lens on another camera with same results? Can you get better results with another lens or another camera? There are too many variables here for me to diagnose your situation. You should see about post processing sharpening. I suspect that you probably very well be happy after finding the proper sharpening tools. In the case of the osprey, it's in the shade and the flat light fill-in doesn't help sharpness at all. So, keep trying and I hope you'll find a solution to your problem. [/QUOTE]

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