-3db gain vs. 0db gain.
I realized there is something i dont know but feel i shou;ld.
What is the advantage of shooting -3db gain over 0db gain. I suppose -3 db can help in very bright situations, but for the most part does it improve the image quality? |
I doubt you would see that much of a difference, since you will probably have more than enough light for a decent exposure. I use -3dB on those occasions, but I can't quantify the difference in picture quality. Sure, in theory, the less gain, the cleaner the image. But 0dB is pretty clean. Perhaps at the 1920x1080 HDMI output, you might be able to scrutinze the image noise characteristics enough to see a difference.
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I used it when shooting the stars once. I used 16frame slow shutter and -3gain. It brought out the stars while keeping the sky relatively black.
The orion nebula (the little smudge in the center) |
So my general question is; If you are in a situation where you can use -3db gain and still expose a bright enough image, then should you always use it in this case?
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I think when shooting indoors you should keep it 0db. Outdoors or very high-contrast shots I'd switch it to -3db.
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