[APML] Raw NGC7000

["Steve Lindsey" <stevelindsey@earthlink.net>]

Here's the raw scan (with some levels stretching since the scan was quite
dark) so you can tell me what you think caused the arc'd stars around the
perimeter.

http://home.earthlink.net/%7estevelindsey/NGC7000raw.html

My buddy Dan did the polar alignment very carefully on the TV85 with a 3X
barlow and 12mm illum. reticle eyepiece.  He worked at this for over an hour
so I'm surprised if there was field rotation.  We didn't keep good notes on
where the guide star unfortunately.  It was from the off-axis guide chip in
the ST8 Dan was shooting with on the TV85.  His imaging chip was centered in
the same FOV as this 300mm lens.  Maybe just guiding off-center was the
problem but I don't get why this should matter that much if mount was well
aligned and I'm still thinking that maybe the lens doesn't like being wide
open.

Let the experts speak...  I'm all ears.

Steve


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