Testing a Super Telephoto

Started Oct 25, 2012 | Discussions thread
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CameraCarl
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Testing a Super Telephoto
Oct 25, 2012

Any thoughts about how best to test a 500mm f4 for sharpness? I've tested mine using test charts I printed out and micro adjusted it for my 1D Mark IV.  The images of the test page and book covers that I have shot look sharp. But I can't seem to achieve the same amount of sharpness of, for example,  feather details that I see posted on DPReview frequently.  I've arranged to borrow a friend's 500 to do side by side comparisons, but it is a bad time of the year to reliably find birds where I live, so I'm looking for suggestions of how I might set up a test of my camera body with his lens and with mine.

 CameraCarl's gear list:CameraCarl's gear list
Sony Alpha NEX-6 Canon EF 70-300mm f/4-5.6L IS USM Canon EF 24-105mm f/4L IS USM Sony E 16-50mm F3.5-5.6 PZ OSS Sony Vario-Tessar T* E 16-70mm F4 ZA OSS +1 more
Canon EOS-1D Mark IV
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