This was 20x120, darks with Atik 314L mpcc,cls, Orion 200.
I added another spacer, between the filter wheel & mpcc, this time. I think it is a lot better. Although there seems to be rotation around. I must admit I did not make sure of the tightness of the focuser, also I had changed the position of the camera, so perhaps a bit loose.
The sky was very light, but I am still trying to get the correct settings & then I will be away.
(http://s712.photobucket.com/albums/ww124/virginiafay/M13-20x120-dks-Orion-mpcc-c.jpg)
getting there, are you remembering to check the collimation?
I did it last week Chris. I suppose I should have another look.....just in case