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The Leica IIIg is a 35mm rangefinder camera introduced by Leica in 1956. It was the last screw mount Leica and it was introduced after the bayonet mount Leica M3 was already in production. As an upgrade of the Leica IIIf, the Leica IIIg introduced these changes:
- Improved viewfinder with a larger image.
- Moving frame viewfinder actuated by the rangefinder mechanism and corrected for parallax.
- Large viewfinder window and small window to illuminate the frame.
- Film type indicator on the camera back.
- Geometric progression shutter speeds: T, 1 second, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500, 1/1000, B.
- Electronic flash sync at 1/60 and 1/30 shutter speeds.
- Self-timer lever.
It was made in chrome finish, although a batch of 125 units were finished in black for the Swedish Army. These cameras have three Swedish crowns engraved.
The Leica IIIg was built from 1956 to 1960 (serial numbers 825,001-988,350) in Germany and in Canada, with approx. 40,000 units produced.
- Leica IIIg user manual at Butkus.org
- Servicing Screw Mount Leicas (PDF), at Pentax Manuals
- Leica IIIg at Sylvain Halgand's www.collection-appareils.fr (in French)