lenses for canon cameras

F2.8 Zoom how much softer than F4?

Mon, 15 Oct 2007 20:32:00 EDT

F2.8 Zoom how much softer than F4?

OK, this question developed from my previous post. It's more geneal and hopefully more useful. I just bought a canon 70-200 F2.8L. I formerly had the F4 version and a used Sigma that I traded u......

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