Hey guys I was testing out my ASI071MC Pro last night and noticed that my images had vignetting that was off center and when I looked at the corners I noticed that the stars weren’t round in the top two corners in the attached single sub of the pelican nebula. The top right corner looks worse. My question is what could be causing this issue?
My telescope is TS Photoline 130 f/7 with 3.7” deluxe focuser, and the 3” TS .79x reducer/flattener.
I am using the ZWO spacer that is included with my 071Mc Pro along with a filter drawer that houses my Baader UV/IR cut filter. The image was guided with guidescope and ASI290mm mini camera. The sub was 120sec, 175 gain and auto stretched in the ASIAir Pro.
Image train: scope>reducer>16.5mm spacer>21mm filter drawer with uv/ir filter>071MC pro. Total backspace=55mm
Any insight would be appreciated. Thanks
Edited by Squanto, 21 June 2021 - 04:56 PM.