Just this Mon. I recv'd a new C8-A (XLT) and the weather cooperated with very good transparency and 'seeing'. After letting the C8-A cool for 6 hrs to ambient, I turned the C8-A on Polaris @ 200X... got a great star 'snap test'... no astigmatism... no pinched optics... excellent concentric ring pattern around the CO (outside focus), BUT as I racked the focus to 'inside' there was only a slight development of concentric 'rings' between the bright outer ring and inner ring around the CO. The C8-A is also in VG collimation. The initial Lunar views late last Mon. were EXCELLENT with great contrast and resolution. Easily better than the 6SE. The initial views of Jupiter gave me my first ever view of the general detail of the GRS (well actually the 'faded' GRS) at 2:40am...
Question, with a good 'snap test' and resolution capabilities of this C8-A, does a lack of total development of a concentric ring patterns on only one side of focus mean anything is amiss?
Thanks for any insight in advance!
Edited by AJK 547, 16 May 2019 - 03:00 AM.