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Consensus on 24-70/2.8 II field curvature at infinity focus?

Started Sep 14, 2013 | Discussions thread
Press Correspondent
Press Correspondent Veteran Member • Posts: 3,362
Much ado about nothing

Rick Knepper wrote:

But the OP wants "decent" edge sharpness across the frame and I am telling you, he ain't going to find it as he presumably defines it if he has such a low opinion of the 24-70 II @f8.

None of the overly dramatic wistleblowers here want to answer a simple question: at what aperture the field curvature is within the DOF? Let us assume the curvature is there wide open, but at f/8 the DOF is from 10 yards to infinity. Is the field curved from infinity all the way back to 10 yards? Doubtful.

Secondly, a lot of landscape folks successfully use 17-40 that is not the sharpest blade at the edges. Does the field curvature of 24-70 II stopped down make it softer than 17-40? I'd find it hard to believe.

Unless these questions are answered, this is much ado about nothing.

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