AD10, NoName8, DS-16 with Spooner primary.
ES, Sterling, Parks, Baader, TV, GSO EP's and a lone Nagler.
Nikon, Celestron binos
Quote:What could possibly be going on? Am I doing something wrong? Is it a funky primary, a misplaced center mark? This is maddening. Any help would be appreciated.
Quote:That's not even close. How does one correct that?
Regards, Clay "The heavens declare the glory of God; the skies proclaim the work of his hands." Psalms 19:1
We mostly come out at night... mostly.
GSO Z8 Degree Circle & Digital Level
Celestron 4"(102mm) SLT 660mm f/6.47
2" 30mm GSO WideView
9mm GSO Plossl
ES 82's : 4.7mm, 8.8mm, 11mm, 18mm
BGO's 5mm, 6mm, 9mm
2" 2X ED Astronomics Barlow & GSO 1.25" 2x Shorty
8-24 Baader Zoom III
Baader M&SG, Semi-Apo
Quote:What do you see when you look at a magnitude 2-3 star at 200x? When you try to focus, as you run through focus, does the image seem to rotate 90 degrees, indicating possible astigmatism?
Quote: the mask was a trace of the blank's circumference.
Quote:Well, if the problem is spherical aberration there is no corrective adjustment. You will have mushy focus because the light from different zones of the mirror is not coming to a common focal point. It's just a poorly made mirror.
Brian S. Johnson
All Terrain Z10 http://tinyurl.com/ouxfsyu with refigured primary, 63mm Protostar secondary.