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General Photography
Low Light & Night
Post your low light long exposures
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<blockquote data-quote="J-see" data-source="post: 404699" data-attributes="member: 31330"><p>Nope, I'm saying that at ISO 100 and ISO 6400 the exact same amount of photons hit the sensor. The only thing that changes is that ISO affects the readout of the meter that is converted to a digital signal.</p><p></p><p>You can easily show me that the sensor is truly adjustable in sensitivity. Take a shot of the night sky at 1 second f/2.8 and then each following shot you up the ISO one stop and decrease the shutter one stop. If the sensor can be adjusted, the ISO 6400 at 1/60s should not be different from the ISO 100 at 1 second.</p><p></p><p>If the sensitivity of the sensor increases, which should increase accuracy since it now can measure a weaker signal, why then does noise increase too?</p><p></p><p>Here; two shots ISO 100 and 6400, the 100 overexposed 3 stops and the 6400 underexposed 3 in post to bring them both to the same exposure. The 6400 should make the sensor much more sensitive if that would be true which logically should result into a better shot showing a lot more stars than the ISO 100. And it is ETTR as prescribed to get the better quality. </p><p></p><p>If ISO only affect the read-out, 100 should be the better shot and contain as many stars as the 6400.</p><p></p><p>[ATTACH]134109[/ATTACH]</p><p></p><p>[ATTACH]134110[/ATTACH]</p><p></p><p>Here it's explained very simple in a video. </p><p></p><p><a href="https://www.youtube.com/watch?v=WEApLA-YNko" target="_blank">https://www.youtube.com/watch?v=WEApLA-YNko</a></p></blockquote><p></p>
[QUOTE="J-see, post: 404699, member: 31330"] Nope, I'm saying that at ISO 100 and ISO 6400 the exact same amount of photons hit the sensor. The only thing that changes is that ISO affects the readout of the meter that is converted to a digital signal. You can easily show me that the sensor is truly adjustable in sensitivity. Take a shot of the night sky at 1 second f/2.8 and then each following shot you up the ISO one stop and decrease the shutter one stop. If the sensor can be adjusted, the ISO 6400 at 1/60s should not be different from the ISO 100 at 1 second. If the sensitivity of the sensor increases, which should increase accuracy since it now can measure a weaker signal, why then does noise increase too? Here; two shots ISO 100 and 6400, the 100 overexposed 3 stops and the 6400 underexposed 3 in post to bring them both to the same exposure. The 6400 should make the sensor much more sensitive if that would be true which logically should result into a better shot showing a lot more stars than the ISO 100. And it is ETTR as prescribed to get the better quality. If ISO only affect the read-out, 100 should be the better shot and contain as many stars as the 6400. [ATTACH=CONFIG]134109._xfImport[/ATTACH] [ATTACH=CONFIG]134110._xfImport[/ATTACH] Here it's explained very simple in a video. [URL]https://www.youtube.com/watch?v=WEApLA-YNko[/URL] [/QUOTE]
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