|
Optical aberration in OAG
Another 'image' from last night.... unfortunately not much from the big end of the scope. This is something I've noted before in the PHD window.
Scope is 8" f/4 Bintel Newt. OAG and lodestar.
Is this astigmatism? - it has never seemed to bother PHD much, but I suspect it is an amplified version of what is happening in the main CCD.....
|