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No mould.... I think it is a light leak after sleeping on it.... I didn't pay attention to shielding the PC/PSU, given I was shooting darks....
I took 6x10min frames.
Frame 1 started while I was there, had main light on - has average pixel intensity of 10000, and prominent black marks....
Frames 2-5 - average pixel intensity of 2500 or so, less prominent black marks.... main light off, but the PC display was on a 45 min power save before shutting off...
Frame 6 - looks fine, av pixel intensity of 1300 and no black marks - the PC display would have blacked during frame 5....
Will try these again soon....
I did notice similar on a scout frame the other night (attached), I think the main light was on at the time then also....
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