1949 Canon IIB is
considered a Leica copy. It differs from a screwmount Leica by having a
combined rangefinder / viewfinder window at the rear. This model is the
first with a 3 way magnification control for the viewfinder, which is
located below the rewind knob. Slow speeds split a 1/20th of a second.
The M39 Leica thread lens is a Canon f1.8 / 50mm non-collapsible lens.
The camera set includes a Serenar f3.5 / 35mm wide angle lens and a
Serenar f4 / 135mm telephoto lens.