Hi guys,
I need some help with my imaging! I have recently purchased a Skywatcher 130PDS and SW Coma Corrector, however I am getting elongated stars in my images (see attached).
The coma corrector has 55mm of backfocus, and sits in a train as follows - focuser > CC > OAG > Filter Drawer > ASI533MC Pro Camera.
As you can see in the image, the brighter stars are not so much of an issue however the smaller stars are. Collimation is fine, as is focus.
Could this be a spacing issue, coma, or something else? I'm at a loss! Any help would be greatly appreciated.
Image details:
1.5hrs
120s Subs
L-Pro Filter