Last summer I did a whole series of GBH shots with 7D + 800L, and I was pleased with the results, although I had to apply NR on some of those files even at ISO 200, because of large crops. However, that was a small price to pay. Again, the targets were relatively large/close, barely moving and easy to focus on, and in very good light.
Under those conditions I was able to utilise the 7D\'s prodigeous sensor pixel density very well.
Here is one example from that GBH series, probably cropped close to 50%.
Sep 06, 2012 at 12:47 PM
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