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Photography Q&A
High ISO Performance and Fast Lenses
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<blockquote data-quote="J-see" data-source="post: 472175" data-attributes="member: 31330"><p>Evidently the sensor pixels are at the receiving end of diffraction since diffraction is a property of waves. The smaller the aperture, the more those waves spreads. But the catch is that the smaller those pixels at the receiving end, the faster those waves occupy too much surface for the cam to be able to distinguish between the one and the other pixel.</p><p></p><p>If you heavily down-sample a shot it matters less since perceived sharpness increases while down-sampling but the moment you start cropping it makes all the difference.</p><p></p><p>Most FX are diffraction limited around f/22. After that there is no gain. But even long before it might become noticeable depending the subject.</p><p></p><p></p><p>If you want to do the test; take a page out of a book and shoot the text at 1:1 using f/4 up to f/40 and then show me the 100% crops.</p></blockquote><p></p>
[QUOTE="J-see, post: 472175, member: 31330"] Evidently the sensor pixels are at the receiving end of diffraction since diffraction is a property of waves. The smaller the aperture, the more those waves spreads. But the catch is that the smaller those pixels at the receiving end, the faster those waves occupy too much surface for the cam to be able to distinguish between the one and the other pixel. If you heavily down-sample a shot it matters less since perceived sharpness increases while down-sampling but the moment you start cropping it makes all the difference. Most FX are diffraction limited around f/22. After that there is no gain. But even long before it might become noticeable depending the subject. If you want to do the test; take a page out of a book and shoot the text at 1:1 using f/4 up to f/40 and then show me the 100% crops. [/QUOTE]
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