First time testing Rokinon 135mm f/2 on my Olympus E-M10 IV (so equivalent to 270mm on a full frame camera). Bortle ~8, untracked 2160x1s exposures for 36 min total, processing all in Siril. Used master dark and flat. Looking forward trying it on slightly darker skies. Sharper than previous lenses, and using a bahtinov mask definitely helped!
Any feedback welcome!
by The_Dingos