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Most CMOS sensors are much more sensitive in the red/infrared spectrum, that's why all cameras have a IR cut-out filter. This filter is removed in astrophotogr
by aortega 10y ago
Most CMOS sensors are much more sensitive in the red/infrared spectrum, that's why all cameras have a IR cut-out filter.
This filter is removed in astrophotography cameras (you want all the light you can get) giving aprox. 50% more light gathering, but mostly in red/IR colors.
- wyager 10y agoThat doesn't explain why the noise image is red, given that the noise excitations are endogenous and don't go through the filter, does it? Unless that noise isn't noise at all but IR from the room.