Had another go tonight although conditions were far from good. With the Celestron Nexstar 4SE (1325mm f/13) I didn't get anything great. I tried adding the 2x barlow giving 2650mm f/26. I know this is way into diffraction limiting, but thought it might help offset the negative side of sensor characteristics. Well, it seemed to have worked. Compared to the direct case I had better contrast, detail and noise control. Because of the size I ended up having to stitch 5 shots together, but in one region I didn't get a clear shot. The stitch feature of Photoshop Elements didn't like it much either and it took some manual arrangement to get it right, and I'm left with a small glitch. Result here
. I believe if the conditions were better, this would have been my best imaging so far.
Yesterday I got my 2nd scope. This time a Celestron Astromaster 130 EQ MD. It's a lot cheaper than the first one, but an inch wider. Aside from that, it is 650mm f/5 so short and wide. I hope to go for different stuff once conditions improve. But I've hit a snag already. Using an eyepiece adapter to attach my camera, I can't focus on the moon. It looks like I don't have enough focus range and need to get the camera closer to the telescope than is physically possible. Using 25mm and 10mm eyepieces looked fine. Any ideas on things I can do?
Finally, an observation.. It seems every time I use any camera with a scope I get dust on the sensor. My blower seems to be getting a lot of use recently.