LEFT: Unmodified Argus C4 with the standard 50 mm Argus Cintar f/2.8 lens.

RIGHT: Modified Argus C4 with Lithagon 35mm f/3.5 lens.  Knob and latch shown to the right of the lens indicates a C4 has been modified for Lithagon lenses.  Modified C4s could also accept modified Cintar 50mm lenses in addition to the Lithagon lenses shown below.

 

 

 

45 mm, Lithagon standard Lens, f/1.9

Very fast, very sharp, very rare! 

 

 

 

35 mm, Lithagon, f/4.5

 

 

 

100 mm, Lithagon, f4.5