Quote:
Originally Posted by multiweb
Forgot about that one. I point the scope up and stick an A4 EL sheet. I take 20 flats, then rotate it 90 degrees, another 20, then 45 degrees, another 20, then finally 90 degrees and another 20. Stack 80 flats mean combine. If you have something big enough to cover the aperture then do it in one go but it doesn't really matter.
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Cool , thanks for the tip Marc.
So the uncovered portion of the aperture doesn't result in a blown out or effected histogram?