ir-1 Grand Prix Brussels 1958 37mm f/2.8 M39 to M42 2.8/37 SLR lens.

Legendary Soviet wide angle lens Mir-1 37mm f2.8 with an M39 SLR screw mount.

Early version with "Grand Prix Brussels 1958" inscription on the body.

Can be mounted via standard M39 to M42 adapter ring and appropriate M42 to modern camera adapter.

49mm filter.
Aperture range 2.8-16