Femoneg replacement

Description

A 3D-printed replacement Femoneg. My Optocom with CLS501 color head was also missing the Femoneg. Second-hand these things go for upwards of 200 euros even when they’re in a bad state, so I thought, why not design a replacement?

The Femoneg is inset with AN glass on both sides, more specifically True-Vue Reflection Control. It even has the masking rods of the original integrated. It’s printed in two parts with a metal hinge.

Printed in PETG. PLA could probably work, but the glass transition point is at ~60C, so I suspect that after working for a time with your enlarger it might warp.