dynamic range and thermal noise


dear ng,

I´m still into analog photography but have a keen interest in the
digital technique. As far as I understand it, the dynamic range of an
imaging sensor/camera combo is defined as the maximum signal divided
by the noise which is produced in the various stages. Does thermal
noise still play a vital role in this calculation (as far as longtime
exposures are concerned) or is it so successfully erased by the noise
reduction techniques that it doesn´t have to be be taken into account
in calculating dynamic range?

Best regards for your input!
Marc Wossner

.

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