Doc Barry wrote:
Hi Jerry,
When you reply to a post, please click on "Quote Reply" so that we all know to whom you are replying.
FWIW, I just took my D810 with the 150-600mm G2 Tamron lens set at 600mm and the B+W CPF, and took a shot of a house about 100m away with then lens well defocused. When I pressed the AF button, the lens quickly focused and the picture was taken. The details in the bricks was sharp. So unless your Canon camera's AF threshold sensitivity is a lot poorer than my Nikon camera, I still would consider your CPF is the problem.
Good luck!
Hi Jerry, br br When you reply to a post, please ... (
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I appreciate your help. Thank you!