Teleconverter MC TKL-2 can be attached directly to cameras with the M42 mount and to other SLR cameras with the appropriate adapters...
Teleconverter MC TKL-2 Specifications:
Maximum Magnification
2x
Working distance, mm
45,5
Type of mount
M42 x 1
Overall dimensions, mm
Diam. 55x40
Mass (less carrying case), kg
0,125
See also: Zenit SLR Cameras |M42 (Zenit) Lenses | M42 Lens Adapters