Using C8 and EOS350D.
Did some test photos at prime focus.
Stars (Jewelbox): 1" slight trailing. 2" obvious trailing.
Moon (approx 6 days old) 0.004 (1/200) or 0.005" quite good (iso 800).
I usually write a blog post about once a week. The latest post can be viewed here: What Is Anything?: Use language in an honest way to communicate instead of obfuscating. (posted 2025-08-07 at 20:27:52). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2025-07-18 Too Many Road Cones: I think it is clear, there are too many road cones!.