Vixen Dovetail Mount for MTO-500 (ZM-5C) Soviet Mirror Lens

Vixen dovetail mount for MTO-500 (ZM-5C) Soviet mirror lens. Perfect for astrophotography, telescope mounts, lunar & solar imaging. Secure your vintage lens with felt lining. Compatible with Vixen-style dovetail systems for astronomy setups.

Vixen-compatible mount designed for the legendary Soviet mirror lens MTO-500 (ZM-5C).

The mount consists of two parts that are joined together using four M3×12 screws.
You will also need four M4 nuts, and dedicated hex pockets are included in the design.

Update v2

Added a version of the top cap with an integrated mini Vixen / finder shoe for mounting a finder or solar finder.

Includes a 5.6 mm hole for a brass threaded heat insert (M4×6×6) to securely fix the finder with an M4 screw.

This adapter allows the lens to be mounted securely on Vixen-style dovetail systems, making it suitable for astronomy mounts, trackers, and astrophotography setups.

My particular lens was manufactured in 1968 and reached me in near-perfect condition. Because of that, I wanted the mount to treat this beautiful piece of engineering with care.

To protect the lens body from scratches, I applied felt or another soft lining material.
In my case I used felt strips 28 mm wide with a thickness of approximately 1.7 mm.

This mount makes it easy to use the MTO-500 in:

astrophotography setups
telescope mounts
star trackers
lunar and solar imaging

A simple way to give classic vintage optics a second life in modern astronomy setups.

Hardware Required
4 × M3×12 screws
4 × M4 nuts
felt or soft lining 28 mm wide (~1.7 mm thick)

Print Settings

Recommended materials:

PLA
PETG (recommended for durability)

Suggested settings:

Layer height: 0.2 mm
Walls: 4 perimeters
Infill: 25–40%

Supports not required.