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How sharp is your lens ?

February 06, 2020 - Or more specifically, how sharp is your lens wide open at the center of the frame under controlled conditions? A side b...

January 27, 2020 - So I bought the LensAlign focus calibration system (minus the focus tune software) a few years ago. The idea was to get...

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lensalign back focus front focus michel fleury Nikon 500mm PF phase fresnel AF fine tune align focus tune lens