I have recently purchased the ASI2600MC Duo and have seen some strange issues in AA+ that I haven't seen before. This is with an C11 SCT, both with Hyperstar and with the camera at the back using a Starizona .63 reducer/corrector. I'm not sure if my problem is with the camera or the AA+ (assuming it's not me). I'm able to create a dark library for guiding but the guiding screen shows fair sized, inky dark spots. If I turn off the use of the dark library without any other change, the spots disappear. When I open Sky Safari everything is blurred. I can see the stars but but they are faint and blurry and I don't know what to do about this. I am also having some difficulty with the 220 sensor guiding. I can change the focus, using the knob on the side of the camera but no matter what I do I can't seem to get any sharp stars. Whether or not these issues are related I haven't a clue other than the coincidence. It hasn't stopped me from imaging but sure makes it a lot more difficult than it should be.