EXCERPT page containing first few paragraphs. 2019-06-18 00:52:17
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This comparison turns out to be far more informative than lab tests that would elevate the Sigma 28/1.4 to the top of the heap. At best that is a dubious claim, based on evaluating the entire image across the frame and near to far. Real-world depth of field, field curvature and focus shift all come to bear and in that regard the two lenses differ markedly. What I care about is total image sharpness across the frame and near to far, delivered as consistently as possible (without “bulges” in the performance).
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