Will the ST-5C or ST-237 be a good match for my new Schmidt-Cassegrain telescope?
Yes! Both the ST-5C and ST-237/A will work very well with Schmidt-Cassegrain telescopes. The CCD in the ST-237A camera is about twice as large as the CCD in the ST-5C so it will give a field of view about twice as large. With either camera, however, we strongly recommend using a focal reducer on your F/10 SCT to bring the focal ratio down to F/6.3 or better or using it with Celestron’s FasStar F/2 telescopes. Using a focal reducer accomplishes two things: It increases the field of view and it reduces the exposure times. SBIG also offers a custom focal reducer that screws into the nosepiece of these cameras that will yield F/5.95 or F/3.75 depending on the extension tube selected. Either the ST-5C or ST-2237/A may also be used as autoguiders for film photography or for guiding another CCD camera. The cameras come with a cable that connects directly to an LX200 CCD port or similar autoguider input plug on other telescopes.
