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Would combining Peltier coolers with CMOS/CCDs on high ISO photos work? How much of the noise at higher ISO is heat, little I'm guessing?
by andy_ppp 10y ago
Would combining Peltier coolers with CMOS/CCDs on high ISO photos work? How much of the noise at higher ISO is heat, little I'm guessing?
- abakker 10y agoYou'll notice on this page - http://www.primalucelab.com/astronomy/d5500a-cooled-camera.html http://www.primalucelab.com/astronomy/d5500a-cooled-camera.h... - that the before/after photo is taken at ISO 6400.I consider that to be reasonably high ISO. But yes, at some point, heat is not the primary issue anymore.
- Sanddancer 10y agoQuite a bit, actually. It's why high end telescope CCDs do similar things. A high ISO means you're ramping up the gain, so the bits of random noise get amplified too. Cooling it means you're getting rid of one of the more significant sources.
- wlievens 10y agoOn a CMOS higher ISO is just increased analog amplification. If your pixel is measuring thermal noise the. You will amplify that too I guess.