Hi folks...
I have noticed the oblong stars on my pics-all pointing towards the top left. See the Horsey attached. I am trying to work out whether this is 1/ polar alignment 2/ collimation 3/ coma 4/ flexure or a bit of everything!!
A description of my system first-
Vixen RS 200 f4 Newt with after market Moonlite focuser, Modded canon 60Da (quite heavy) with coma corrector attached to T adaptor (I think correct spacing -MPCC) , PMX mount and guided by 80mm guide scope on ADM plate atop newt with lodestar.
Now I have included pics of stars inside and outside of focus to see if you think it it collimation -I thought it looked OK on the screen (a secondary offset is normal in f4).
I haven't rechecked my PA in a while, and have changed scopes so I could have bumped that- I will do another calibration run when the clouds go, and I have an OAG but haven't got around to setting it up yet.
So in essence I am asking you to see if you think there are obvious places to start to hunt down the issue/s!!
Thanks for any advice
Graham
