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<p>[QUOTE="semibovinian, post: 2664375, member: 76467"]I wouldn't avoid cameras with smaller pixel pitches, as long as they're at least APS-sized and as long as the readout noise and well capacity scale down in proportion to the pixel area. </p><p><br /></p><p>If you want to capture everything the sensor can record, you need to shoot at the DLA or wider. My camera (Canon T6s) has 3.72 micron pixels with a DLA of 5.6, but the AA filter limits the maximum resolution to about 3 pixels per line pair, so maybe f/8 is good enough?</p><p><br /></p><p>On the other hand, if you want to get all the resolution that a given lens provides, you'd need to oversample the image with a sensor with small pixels. Over at the other coin forum, there were some lens tests using USAF 1951 test charts where you could see that many (but not all) macro/enlarging lenses shooting at 1x could significantly outresolve the T6s sensor . A 10X microscope objective was used to project the areal image from the lens onto the sensor, greatly reducing the effects of pixel size. </p><p><br /></p><p>There was also a test that showed that even the 10X Mitutoyo objective, with a sensor-side effective f-ratio of 15-18, could benefit somewhat from pixels smaller the 3.72 microns of the T6s. This test used a 2X teleconverter to magnify the image as seen by the sensor. It's also true that the 10X Mitutoyo doesn't max out the T6s sensor resolution.</p><p><br /></p><p>Also, Rik Littlefield over at Photomacrography.net did some tests on a 135mm Olympus lens at f/11, and showed it outresolved a DSLR sensor.</p><p><br /></p><p>Of course, there are disadvantages to small pixels -- the images take more disk space, and could be noisier if you do pixel peeping (because of the smaller well size and increased photon accumulation noise). Also, if you want to get the best images the sensor can capture, you may need to resort to stacking more often.[/QUOTE]</p><p><br /></p>
[QUOTE="semibovinian, post: 2664375, member: 76467"]I wouldn't avoid cameras with smaller pixel pitches, as long as they're at least APS-sized and as long as the readout noise and well capacity scale down in proportion to the pixel area. If you want to capture everything the sensor can record, you need to shoot at the DLA or wider. My camera (Canon T6s) has 3.72 micron pixels with a DLA of 5.6, but the AA filter limits the maximum resolution to about 3 pixels per line pair, so maybe f/8 is good enough? On the other hand, if you want to get all the resolution that a given lens provides, you'd need to oversample the image with a sensor with small pixels. Over at the other coin forum, there were some lens tests using USAF 1951 test charts where you could see that many (but not all) macro/enlarging lenses shooting at 1x could significantly outresolve the T6s sensor . A 10X microscope objective was used to project the areal image from the lens onto the sensor, greatly reducing the effects of pixel size. There was also a test that showed that even the 10X Mitutoyo objective, with a sensor-side effective f-ratio of 15-18, could benefit somewhat from pixels smaller the 3.72 microns of the T6s. This test used a 2X teleconverter to magnify the image as seen by the sensor. It's also true that the 10X Mitutoyo doesn't max out the T6s sensor resolution. Also, Rik Littlefield over at Photomacrography.net did some tests on a 135mm Olympus lens at f/11, and showed it outresolved a DSLR sensor. Of course, there are disadvantages to small pixels -- the images take more disk space, and could be noisier if you do pixel peeping (because of the smaller well size and increased photon accumulation noise). Also, if you want to get the best images the sensor can capture, you may need to resort to stacking more often.[/QUOTE]
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