Originally posted 03 November 2018 - 08:44 PM in NexStar Forum, which may not have been the most appropriate place:
...so, I am posting here in hopes of some input from others. With thanks.
Here's my question: what have you used and what would you recommend to place a 2" filter into the optical path of an Celestron 8SE for astrophotography? Solutions that I have seen seem to involve a SCT visual back adapter into which a second component (that accepts 2" filters) is inserted, which in turn accepts a T-Adapter. Obviously, there is a fair bit more involved here than for visual observing where a 2" diagonal is normally threaded for a 2" filter.