Leica III (1933–1939)

Name: Leica III
Brand: Leica

At 1/500th and 1 second, it opened the shutter to a new era - smaller than a brick, heavier than a promise.

Overview

The Leica III isn't a reinvention. It's an evolution with a few quiet tweaks. Introduced in 1933, it arrived alongside the Leica II series and carried over nearly all of it: the same compact M39 screw-mount body, the same coupled rangefinder, the same 35mm film format. The one big addition was slow shutter speeds down to 1 second. That gave photographers control in lower light and longer exposures without external timers. For anyone who knows the Barnack lineage, the III is where Leica started refining its formula rather than redefining it.

The slower speeds down to 1 second live on a dial on the front of the camera, just ahead of the lens mount. The faster speeds sit on the top plate, next to the film advance knob. The top dial rotates during exposure, so you can see the mechanism working. Film transport is entirely by knob, both advance and rewind. No levers, no automatic stroke. Each frame is wound by hand, which modern shooters might find archaic but enthusiasts often praise for its precision.

The III wasn't left behind as technology advanced. Leica offered factory upgrades for earlier models well into the 1950s, and many cameras originally built as Leica IIs or even Is were converted to III specification - and later, to IIIa or IIIf - at the Wetzlar factory. These bodies kept their original serial numbers, which is why a camera with a 1932 serial might come out of service with III features. That blurs the line between model and modification and makes provenance tricky.

Specifications

Manufacturer	Leica / Leitz
Exact product name	Leica III (also known as Model F)
Product type	35mm rangefinder camera
Lens mount	M39 screw mount
Film format	35mm
Shutter speed range	1 second to 1/500 plus Z (time) — note: some sources report up to 1/1000 sec, but this is unconfirmed for the base III model
Viewfinder	Set for 50mm lens; requires accessory viewfinder for other focal lengths
Production years	1933–1939
Code number	AFOOV

Key Features

Slow Speeds Down to 1 Second Added

This is the defining upgrade over the Leica II. Prior models lacked slow speeds down to 1 second, which limited low-light flexibility. With slow speeds down to 1 second, photographers could shoot interiors, night scenes, or motion-blurred subjects without guesswork. It wasn't a flashy change, but a functional one, and it laid the groundwork for the IIIa's further refinements.

Front and Top Shutter Speed Dials

The dual-dial system splits the exposure range. The front dial handles slow speeds, which reduces the chance of accidental selection during handheld shooting. The top dial rotates during exposure, and its motion confirms the shutter is running.

Knob-Driven Film Advance and Rewind

No lever here. The III is wound manually with a knurled knob on the baseplate side. That's slower than a lever advance. The rewind knob is manual too. It's laborious by modern standards, but part of the camera's tactile appeal.

Accessory Viewfinder Socket for 50mm Calibration

The built-in viewfinder is made for 50mm lenses. With a 35mm or 90mm, framing becomes guesswork unless an external viewfinder is clipped into the accessory shoe. This socket accepts a range of Leica's framelines, so you can compose accurately across focal lengths. It's a modular system, and it favors adaptability over integration.

Factory Upgrade Path to Later Models

Leica didn't treat early cameras as disposable. Owners could send their II or III bodies back to the factory for updates to the latest model, including IIIa conversions. These factory-modified cameras keep their original serial numbers, which makes authentication a challenge. A III with a 1932 serial isn't a fake - it's an upgraded survivor.

Historical Context

The Leica III appeared in 1933, one year after the Leica II, and was produced in parallel with later variants of that model. It began iterative development in the Barnack line, where each new model built on the last with targeted improvements. The III was succeeded by the IIIa, which extended the top shutter speed to 1/1000 sec. Production ran until 1939, with chrome-finish models designated "Mod.F" under the AFOOV code. In the US, these cameras are commonly called "screw mounts" or "LTM"; in Japan, collectors often call them "Barnack Cameras" in honor of designer Oskar Barnack.

Collectibility & Value

Market values for the Leica III vary widely with condition and completeness. According to recent reports, a body with a working shutter and rangefinder might fetch around $300. In mint condition, with a lens, values climb to $800 - $900. A 2024 listing for a Leica III (Mod.F) chrome body noted $1,102 for condition A- and $1,296 for A-B, which suggests strong demand for well-preserved examples. Condition matters, though. Common issues include inaccurate fast shutter speeds (where 1/500 may actually fire at 1/250) and degraded rangefinder mirrors. One owner described a "bashed up pre-war Leica III" needing shutter repair, mirror replacement, and body re-covering. The III is often seen as a practical entry point into Leica ownership, with the Barnack experience and without the premium of rarer variants.