Hi. I am a user of an ST-2000XCM camera, recently purchased second hand. I use an LX200 8 "EMC f / 6.3. I have a problem, and that is that when I focus the main CCD, the tracking CCD is very unfocused (donuts). Apart from the field curvature of the optical system, could it be because the tracking CCD is not well adjusted ?. Thanks and best regards Carlos