You’re welcome. I don’t image myself but occasionally use the my ‘scopes as long telephoto lenses for aircraft or the moon during an eclipse. Although I invested in both 2” and 3.5” extension tubes (sorry called it 3” before) from Tele Vue, my most used part when photographing is the ACM-2000 for 2” and ACM-1250 for 1.25” only telescopes as these have an inbuilt extension.
Prime focus:
https://www.televue.com/engine/TV3b_...d=42&Tab=_spec
Extension tubes:
https://www.televue.com/engine/TV3b_page.asp?id=93