[g__day (Matthew)]

Gary,

Thanks! Here a planetary nebula with alot of star s around it - I would guess its telling me the OAG's focal reducer is causing unintended consequences, as all the stars flare out from the cntre when you look at it under magnification. The fields was very flat before the OAG was added!.

I used CCD Inspector to check collimation - perfect in X, 0.2 arc seconds error in Y. And MaximDL check focus to get optimal focus (FWHM 2.28" with a pixel scale of 0.645), CCD Inspector says curvature is 60% - which seems extreme to me?

This is a stacked 20+ minute shot (55MB TIF reduced to a 185 KB jpg).

Matthew