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Diffraction limited pixels... Really?
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<blockquote data-quote="aroy" data-source="post: 363019" data-attributes="member: 16090"><p>In one of the reviews of the Zeiss 135mm APO, the author stated that diffraction magnifies the CA. At very fine detail the CA will make the image fuzzy at say f11. With APO, where the CA is less than the pixel size, the lense could be used at f11 or even f16 without showing any fuzziness due to diffraction.</p><p></p><p>So I have to use higher F stops for say macros, I would search for a good APO lense. That is why some of the industrial lenses (which are true APO) cost so much. They are corrected for geometric as well as chromatic aberrations, much below the pixel pitch of the current sensors.</p></blockquote><p></p>
[QUOTE="aroy, post: 363019, member: 16090"] In one of the reviews of the Zeiss 135mm APO, the author stated that diffraction magnifies the CA. At very fine detail the CA will make the image fuzzy at say f11. With APO, where the CA is less than the pixel size, the lense could be used at f11 or even f16 without showing any fuzziness due to diffraction. So I have to use higher F stops for say macros, I would search for a good APO lense. That is why some of the industrial lenses (which are true APO) cost so much. They are corrected for geometric as well as chromatic aberrations, much below the pixel pitch of the current sensors. [/QUOTE]
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Diffraction limited pixels... Really?
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