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Al I figure the height of that prom is about 24,000 to 36,000 km high and about 48,000 wide. A drop in the ocean really on a disk that is 1.39million across.
Houghy, I know what the problem is, I have to use a flat field to get rid of it now. Except when imaging on the limb. It does not show up as much. I found that it is hardly noticable with the 2x barlow, but becomes really evident as I go up in image scale. This was taken with the 5x powermate, but the banding did not show up much. I can still see them, but only just.
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