Argus Match-Matic C3 Shutter/Aperture Settings

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The Match-Matic C3 uses "additive" numbers for the lens openings and shutter settings.

The lens openings and their equivalent f/stops are:

3 1/2	f/3.5
4	f/4
5	f/5.6
6	f/8
7	f/11
8	f/16

The shutter settings and their equivalent speeds in fractions of a second are:

4	1/10
5	1/30
6	1/60
7	1/125
8	1/300