Argus C44/C44R Manual:  Lens Specifications

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Wide Angle Cintagon
Lens: 35mm, color-corrected, hard-coated anastigmat; helical focusing, 3 ft to infinity
f stops: Click stop settings at F:4.5, 5.6, 6.3, 8, 11, 16, 22
Hyperfocal distance: 17 feet 7 inches at f:4.5
Full Field Angle: 64 degrees 30'
Filter Size: Series VI (1 5/8")
Carrying Case: Available as an accessory in genuine leather

Telephoto Cintagon
Lens: 100mm, color-corrected, hard-coated anastigmat; helical focusing, 3 ft to infinity
f stops: Click stop settings at F:3.5, 4, 5.6, 6.3, 8, 11, 16, 22
Hyperfocal distance: 184 feet 6 inches at f:3.5
Full Field Angle: 25 degrees
Filter Size: Series VI (1 5/8")
Carrying Case: Available as an accessory in genuine leather

50mm lenses: f/2.8 or f/1.9 Argus Cintagon
F/2.8: four elements, color-corrected, coated
hyperfocal distance: 57'8" at f/2.8
built-in retainer for series V filters and supplementary lenses

f/1.9: six elements, color-corrected, coated
hyperfocal distance: 85' at f/1.9
built-in retainer for series VI filters and supplementary lenses

Both lenses:
click-stop lens openings to f/22
field: 27x40 degrees at infinity