Quote:
Originally Posted by mswhin63
I am also figuring out a few things with darks. Did a few a few days back.
First - If I alter the lights level do the flats get adjusted as well? It seems logical.
Second - the EOS450D has what the manual noise reduction which is supposed to take a dark and subtract it automatically. Is this proceedure any good?
Haven't had enough time to test it yet.
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Altering the light level only changes the display not the actual data.
Note. Dark subtraction only works with raw or fits files. JPEG files have been compressed at the individual pixel level and this prevents the darks from subtracting the actual pixels affected.