Hi everybody, I'm new in town!
I'd like to have some advice or maybe somebody could have what I'm looking for. I have the 45MX Beseler with a lens board of 50mm hole. I've bought recently a 100mm Componon-S wich didn't have the lock nut. I realized that it must share a 32.5mm retainer ring wich is a pain to find around. Anybody with any advice?