Seeing: Fair to good in suburban Atlanta
Platform: AT72ED on CGEM (go to was pretty good)
Cam modifications: Stock IR removed, Fan installed & wired remote
Optical train: SDC-435>blue fireball nose>GSO .5x FR>Orion IR cut>Orion Imaging Skyglow>AT72ED (no diagonal involved)
My gut tells me there is a problem in the optics here. I tried just about every adjustable setting on the cam and the problem remained as long as the object was visible. I’m pretty confident in the focusing having used a mask though it took a really bright object to get the pattern to focus with. The best focus I could achieve was toward the end of the focuser travel though I can slide the nose out a bit and still have travel room to spare. I approximate that FR is around 57mm from the CCD chip.
Any suggestions would be appreciated.