Konvas-1M - Pentacon SIX lens mount adapter

Konvas-1M, 1KSR-1M camera with prime photo lens Jupiter -36 250 mm F3.5 by Konvas-1/1M-Pentacon SIX lens mount adapter.

The design of Konvas-1/Konvas-1M-Pentacon SIX lens mount adapter included rear screw for installation of round screw glass filters with screw M35.5x 0.75mm