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Optimum Aperture?
For a long time now the conventional wisdom to help obtain maximum image sharpness has been to stop the lens down to its optimum aperture, usually two stops from maximum (wide open). However, this is not true in every case. After acquiring … Continue reading
Posted in Blog, Photo Topics, Tech Talk
Tagged Canon 100-400mm F-4.5-5.6 II, Canon 300mm F-4.0, Canon lens tests
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Optimum Aperture Revisited
Confirming our earlier observation that the old “close-down two stops for optimum aperture (sharpest image)” dictum didn’t necessarily hold for current lens designs, here are the results for the Canon 17 mm tilt shift lens. Not only is this lens sharpest … Continue reading
Posted in Tech Talk
Tagged Canon lens tests, Canon TS_E17mm F4.0
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