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Old February 15th 19, 03:33 PM posted to sci.astro.amateur
Chris L Peterson
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Default Anyone know what these sensors are?

On Fri, 15 Feb 2019 06:14:09 -0800 (PST), RichA
wrote:

Large sensors or small sensors, pixel size ultimately determines visible noise so a 35mm sensor with the same pixel size as an APS sensor is going to have the same visible noise level, only it will cover a larger area with a given focal length lens. This monster sensor has huge pixels, huge well-capacities and should produce less visible noise over a given area than anything else available today.


I don't know what "visible noise" is. With electronic sensors, there
is instrumental noise- mainly dark current noise and readout noise,
and there is the statistical noise present on any signal- the square
root of the number of photons recorded.

For ordinary imaging (short exposure) dark current noise is negligible
and invisible. Readout noise is usually not visible with modern
sensors. So the noise that we see is purely a function of how many
photons we record (which is why we see noise in dark areas but not
light ones). It has nothing to do with pixel size, except indirectly
through the mechanisms I referred to previously.