This is basic key for adjusting the curtain tension of FSU cameras (FED, Zorki, Zenit). It's needed for loosening and tightening the locking nut of the shutter rollers while adjusting the spring tension.
I designed it for Zorki 4 but it also works for FED2, Zorki 5 and 6. Other models use larger locking nuts so it won't fit, but I can provide the source file to anyone needing different dimensions, or upload a different variant with updated dimensions.
The outer grooves make it easy to position the locking nuts so that the locking screws fit.
| FSU_shutter_adjustment_tool_d1.2.stl | 51.9KB |
