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Ok. But why has it never appeared before I removed that Low Pass 1 filter? And why, when I Google amp glow in 450Ds, do I get posts saying 450Ds don't have any_even at ten minute subs? Can this just be a calibration issue or was the low pass filter shielding the sensor?
I have not had to use darks since the cooling mod some six months ago, but did shoot some last week for the dark library, shot at -10C.
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