M42 with evidence of coma?

[ilife13]

I have an image attached which I am not comfortable with. It is a single (one of 18) 2min 30sec sub taken with my newly (self) modified Canon 60D. The scope is a Vixen VC200L with f6.3 focal reducer mounted on a Vixen GPD2 mount using SkySensor 2000 hand control. It was guided with Orion Starshoot Autoguider with PHD2. The photo seems to show coma which I wouldn't expect from this OTA. There is also a cropped version taken from the top left corner of the photo showing the worst of it. Each of the 18 subs is the same and the "coma" points to the centre of the frame. These were the first photographs taken with this scope and camera. Any advice would be appreciated.

David

[raymo]

I don't know if you have just bought the scope new or not. I can only
think that if you bought it used, maybe the corrector lenses are
incorrectly installed.
raymo

[ilife13]

Thanks for your response Raymo. I did purchase it second hand, so I will investigate that possibility.
David