Leica IIIc (1940–1951)

Name: Leica IIIc
Brand: Leica

A 35mm rangefinder camera with screw mount, built in Wetzlar, Germany, with a long-base coupled rangefinder and knob wind film advance.

Overview

The Leica IIIc is a 35mm rangefinder camera made by E. Leitz GmbH in Wetzlar, West Germany, from 1940 to 1951. It belongs to the Leica screw-mount (M39) line. The body is metal, covered in vulcanite with a "shark skin" finish. It has a separate direct-vision viewfinder and a long-base coupled rangefinder with a swing prism mechanism. The rangefinder uses a double-image system for manual focusing. Film is advanced and rewound with knobs, not a lever, and the auto-stop on film advance is linked to the shutter mechanism. Winding tensions the shutter, and there is an exposure counter. To rewind, press a small metal button on the front to release the rewind crank, which folds out. The IIIc has no flash synchronization, which sets it apart from later models like the IIIf.

Specifications

Type	35mm rangefinder camera with screw mount
Film Format	35mm film, 24×36 mm exposures
Years Produced	1940–1951
Lens Mount	M39 screw mount
Shutter	Focal plane, speeds 1 – 1/1000 sec, B, T; speeds 1/30, 1/40, 1/60, 1/100, 1/200, 1/500, 1/1000; second blind delay mechanism
Slow Speeds	Separate slow-speed dial selects speeds down to 1 second, plus T mode
Viewfinder System	Three windows: separate direct-vision viewfinder and rangefinder, plus secondary rangefinder window
Rangefinder	Coupled rangefinder, swing prism type, double image; long-base design
Diopter	Built-in diopter adjustment for the rangefinder
Flash Synchronization	No flash sync
Film Advance	Knob wind, not rapid wind lever; auto-stop coupled to shutter; tensions shutter
Rewind Mechanism	Press front button and fold out rewind crank to rewind
Construction	Vulcanite-covered metal body; bottom loading; all-metal construction, built for structural rigidity
Identification	"Shark skin" finish
Code Name	LOOHW – Camera
Serial Number Example	469

Design

The IIIc has a full-metal body covered in vulcanite with a "shark skin" texture, which gives it grip and durability. It loads from the bottom and is built rigid. There are three front windows: one for the direct-vision viewfinder, one for the primary rangefinder, and a secondary rangefinder window. The coupled swing prism rangefinder focuses by double-image alignment. A built-in diopter corrects the rangefinder without external tools. The advance knob sits on the top right. A separate rewind knob on the bottom left is activated by pressing a release button on the front. The shutter uses a second-blind delay system to get intermediate speeds, and it has a T (time) mode for long exposures.

Context

The Leica IIIc followed earlier models in the Leica III series and was produced during and after World War II. It was the direct predecessor to the IIIf, which added flash synchronization and a self-timer. The IIIc has no flash sync and uses knob wind instead of a rapid lever, so it sits between eras. It improved mechanical consistency over earlier models while keeping pre-war design principles. It was one of the last widely produced Leica screw-mount cameras before the shift toward more integrated features.

Market

Collectors want the IIIc for its build and its place in the evolution of 35mm photography. Working units with clean optics and smooth film transport command premium prices. Common problems are stiff or frozen winding knobs, degraded light seals, and shutter timing that has drifted with age. With no flash sync and manual knob winding, it is less practical for modern use than later models. Its mechanical simplicity and durability make it a favorite for restoration projects.