Because of my lousy location I have no hands-on experience with imaging with sophisticated Goto tracking mounts, just a manual homemade DOB. So I have experimented a bit here with some good results and some screwups. Last night I got a screwup. I was going to image the Bodes Galaxy on Bill's excellent Dark Matters CDK and when studying it in Telescopius I realized that both Bodes and Cigar would fit in the FOV if the camera was rotated 90 degrees. When I was setting up the session, I noticed the subject setting and thought that sounded like I could rotate the FOV imaged. So I set it at 90 degrees and adjusted the RA and DEC accordingly. Alas, I got the regular FOV so the Cigar is almost completely out of the frame and Bodes is crowded down at the bottom.
So what does the "set desired position angle relative to the sky" actually do?
