Please help with my sub

[AlistairW]

Hello,

I took the following sub tonight, but I am getting egg shaped stars on the top half of the frame. I passed it through CCD inspector and got the following :

Min FWHM          1.72"

Max FWHM         4.20"

Tilt in X              +0.0"

Tilt in Y:             -2.4"

Total Tilt            127% @ 90

Collimation         28!

Stars Used         2996

 

Is this classical sag in the draw tube. I am not sure what to try next to correct his. Focuser tension ? - The Tilt in Y seems very large.

 

Thanks

 

Alistair

Pacman_300sec_1x1__frame5.fit