Hello @TieDyeAstronomer!
I do have a Rokinon 135 mm lens. Since you have something similar (or maybe the same), let me ask you this, is it suitable for bright star photometry? Like Betelgeuse or when T CrB is at its maximum brightness?
Thanks again for yesterday. We had a great time indeed, solving problems on the fly. Hahahaha.
Cheers!
Enrique
(BETB)