Still doing some Mark III focus tests. This time a wigeon. I'm pleased with the Servo AF, but I've yet to photograph BIF. I'll be going to Bosque del Apache in the next few days to put the Mark III through its paces and will post impressions and pics.
Canon 1D Mark III, 500mm, f/7.1, 1/1600, ISO 400, -1/3, no flash, handheld








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