I spent the afternoon with Jim Neiger on his boat. It was my first opportunity to test the AF of the 5D Mark III on BIF against varied BGs. My initial impression is that the 5D III has significantly better AF tracking than the Mark IV. I got frame after frame of sharply focused birds. The AF wasn't perfect, but it really was impressive. Of course this is a preliminary impression, and I've got another 4 days of photography with Jim to help me reach a solid conclusion. This frame was processed on my laptop.
Canon 5D Mark III, 500mm + 1.4x, f/7.1, 1/2000, ISO 800, manual exposure, hand held







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