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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: 404149" data-attributes="member: 31330"><p>I just checked it with a shot taken at ISO 100.</p><p></p><p>The only thing that affects the light I capture is the lens' aperture and the cam's shutter speed. With my 24mm that's between f/22 at 1/4000th as a minimum and, ignoring the bulb and timer, f/1.4 at 30s. ISO has zero effect on that.</p><p>That should imply that when I can capture my scene without clipping at the native ISO (100), it is better to increasing brightness levels in post than increasing ISO which only results in more noise since it does multiple the existing noise.</p><p></p><p>This is a shot I took at ISO 100, f/1.4 at 30s. The histograms show there is minimal clipping. Only the blue channel suffered some minor clipping.</p><p></p><p>[ATTACH]133892[/ATTACH]</p><p></p><p>I increased exposure in post to see what data was there:</p><p></p><p>[ATTACH]133893[/ATTACH]</p><p></p><p>I apparently have all I need and that was provided solely by the aperture/shutter combination. More ISO would not have added anything beneficial. Only noise.</p><p></p><p>Evidently, when clipping occurs, it becomes another story. During night shots that is often the darker part of a shot and to avoid that, decreasing the shutter duration should be prioritized over increasing ISO.</p></blockquote><p></p>
[QUOTE="J-see, post: 404149, member: 31330"] I just checked it with a shot taken at ISO 100. The only thing that affects the light I capture is the lens' aperture and the cam's shutter speed. With my 24mm that's between f/22 at 1/4000th as a minimum and, ignoring the bulb and timer, f/1.4 at 30s. ISO has zero effect on that. That should imply that when I can capture my scene without clipping at the native ISO (100), it is better to increasing brightness levels in post than increasing ISO which only results in more noise since it does multiple the existing noise. This is a shot I took at ISO 100, f/1.4 at 30s. The histograms show there is minimal clipping. Only the blue channel suffered some minor clipping. [ATTACH=CONFIG]133892._xfImport[/ATTACH] I increased exposure in post to see what data was there: [ATTACH=CONFIG]133893._xfImport[/ATTACH] I apparently have all I need and that was provided solely by the aperture/shutter combination. More ISO would not have added anything beneficial. Only noise. Evidently, when clipping occurs, it becomes another story. During night shots that is often the darker part of a shot and to avoid that, decreasing the shutter duration should be prioritized over increasing ISO. [/QUOTE]
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Post your low light long exposures
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