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Subject: Star test (on going)lx200 8"
From: JOHN NIEDZINSKI
Reply To: mapug@shore.net
Date: Sat Nov 11 08:13:41 1995

I previously stated that I could never see the "airy disc" during a star
test. Let me correct myself. I can never make out any "diffraction rings".
Was able to star test last night. Skies were clear but seeing was very poor.
Under high power the de-focused image was just boiling,no conclusions.
However w/26mm eyepiece when I de-focuse I always get the following result.
Within the dark centered area(33% obstructed) there is always a sort of fan
blade affect more so on one side of focus but never the less its there on
both sides. Does this fan blade pattern ring any bells. I think I recall
reading something about it somewhere just not sure where.

Thanks

John