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how close? extension tubes and teleconverters
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05-01-06, 17:31
robski
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Join Date: Dec 2005
Location: Kent UK
Posts: 3,741
Christine
As you stop a lens down an effect know as diffraction starts to kick in which affects the lens sharpness. This typically starts to be seen from f16 onwards. So lens that stop down to f32 maybe have great DOF at the cost of image sharpness.
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