This is for a Linhof Super Technika IV rangefinder eyepiece. Remove the current eyepiece, thread this in, and then add one of the cheap diopters off eBay.

• ✅ Female M18x0.75 (internal thread stub)
• ✅ Male M16x0.75 (external thread stub)

• Python ≥ 3.11
• uv package manager

Install dependencies and run via:

uv run rangefinder-eyepiece/generate.py