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<blockquote data-quote="12blackgt" data-source="post: 146924" data-attributes="member: 13825">I took my new D7100 to the Talladega superspeedway last weekend. I had just upgraded from a D90. Overall I was pleased with the results. However, at extreme zoom (200mm) with my NIKKOR AF-S 18-200mm 1:3.5 -5.6 GII ED DX with VR there is a definite degradation of sharpness when the center of the picture is compared to the 4 corners. I did not notice this with the D90, but then again my expectations were diminished with the D90 vs. the D7100. Perhaps I’m expecting too much? This is why I’m soliciting your thoughts about the picture. When you download the picture (warning 12.5 MB) right click on it and then click details to see the camera’s settings the moment the picture was taken. Basically it was auto everything. Of course for photographing the cars at speed I changed the shutter speed to 1/8000. &nbsp; <a href="http://www.davidjohnsonpage.com/D7100.JPG" target="_blank">http://www.davidjohnsonpage.com/D7100.JPG</a></blockquote>

[QUOTE="12blackgt, post: 146924, member: 13825"] I took my new D7100 to the Talladega superspeedway last weekend. I had just upgraded from a D90. Overall I was pleased with the results. However, at extreme zoom (200mm) with my NIKKOR AF-S 18-200mm 1:3.5 -5.6 GII ED DX with VR there is a definite degradation of sharpness when the center of the picture is compared to the 4 corners. I did not notice this with the D90, but then again my expectations were diminished with the D90 vs. the D7100. Perhaps I’m expecting too much? This is why I’m soliciting your thoughts about the picture. When you download the picture (warning 12.5 MB) right click on it and then click details to see the camera’s settings the moment the picture was taken. Basically it was auto everything. Of course for photographing the cars at speed I changed the shutter speed to 1/8000. [URL]http://www.davidjohnsonpage.com/D7100.JPG[/URL] [/QUOTE]

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