Contax III (1936–1942)

At 738 grams and crowned with a selenium meter, it carries the weight of a machine built to out-engineer the Leica—and it did.

Overview

The Contax III, produced by Zeiss-Ikon from 1936 to 1942, stands as a pivotal evolution in the 35mm rangefinder lineage—not because it reinvented the wheel, but because it added one that no one else had dared. Identical in core construction to the Contax II, which launched alongside it, the III distinguished itself immediately by integrating a built-in selenium exposure meter into the top plate. At a time when photographers relied on handheld meters or guesswork, this was a statement. It marked the first 35mm system camera to include such a feature, positioning Zeiss-Ikon not just as a competitor to Leica, but as a technological aggressor.

Despite its heft—139 x 97 x 39 mm and 738 grams—the Contax III was engineered for precision and durability. Its metal vertical traveling shutter delivered a top speed of 1/1250, unmatched by any contemporary Leica model. The shutter speed dial, fixed in place and integrated with the film advance knob, demanded deliberate interaction. There was no room for sloppiness; this was a tool for professionals who valued repeatability and mechanical integrity over convenience. The combined viewfinder and rangefinder, with a 90mm baselength and approximately 0.75x magnification, offered sharp, accurate focusing—critical for the high-performance Sonnar and Biogon lenses it was designed to mount via its dual-bayonet system.

Owners report that the Contax III felt substantial in hand, not just due to its weight but because of its dense, no-compromise construction. The removable back simplified film loading—a small but meaningful improvement over earlier designs—and the inclusion of a self-timer, likely the first on a system 35mm camera, hinted at Zeiss-Ikon’s ambition to offer a complete, self-contained photographic solution. In use, the Contax II and III proved exceptionally reliable, often considered on par with or superior to their Leica counterparts during their era. Most surviving examples today bear the scars of that working life: worn leather, scratched top plates, and the mechanical fatigue of decades.

Specifications

Manufacturer	Zeiss-Ikon
Model	Contax III
Production years	1936–1942
Type	35mm rangefinder camera
Dimensions	139 x 97 x 39 mm
Weight	738g
Shutter type	Metal vertical traveling shutter
Shutter speed sequence	B, 2, 5, 10, 25, 50, 125, 250, 500, 1250
Top shutter speed	1/1250
Rangefinder baselength	90mm
Rangefinder magnification	about 0.75x
Effective rangefinder baselength	67.5mm
Lens mount	Bayonet mount (with inner bayonet for 50mm lenses, outer bayonet for other focal lengths)
Exposure meter	Built-in selenium meter
Flash sync	No factory flash sync

Key Features

Built-in Selenium Exposure Meter

The defining innovation of the Contax III was its built-in selenium exposure meter, a feature that set it apart from every other 35mm system camera of its time. At its 1936 launch, this was a technological marvel—no batteries, no external meter, just a self-contained light-measuring cell integrated into the top plate. By modern standards, its utility is limited; selenium cells degrade over time, and the meter’s calibration is often unreliable today. But in context, it represented a leap forward in usability, allowing photographers to make exposure decisions without breaking workflow. Collectors note that while the meter adds bulk and complexity, it also adds historical significance—this was the first step toward the metered cameras that would dominate the next three decades.

90mm Rangefinder Baselength with Rotating Glass Wedges

The Contax III’s rangefinder system used a pair of rotating glass wedges to achieve focus, a design that delivered exceptional accuracy thanks to its 90mm baselength—the longest of any 35mm rangefinder of its era. This long base translated to a more precise focus patch in the viewfinder, especially critical when using fast lenses at close distances. The effective baselength of 67.5mm, derived from the 0.75x magnification, still outperformed most competitors. The combined viewfinder and rangefinder offered a bright, clear image, though coverage details remain undocumented. For professionals shooting in demanding conditions, this system was a decisive advantage over shorter-base rivals.

Metal Vertical Traveling Shutter with Dual Speed Control

The shutter mechanism was a masterpiece of pre-war German engineering. Unlike horizontal cloth shutters, the Contax III used a metal vertical traveling shutter made of brass slats running on straps. What made it truly unique was its speed control method: instead of varying only the slit width, it adjusted both the size of the slit and the travel distance of the curtains. This allowed for greater accuracy at high speeds and contributed to the camera’s ability to reach 1/1250—faster than any Leica of the time. However, the complexity came at a cost. The shutter straps are prone to failure after decades of disuse, and a non-working shutter is a common issue in un-serviced examples. When functioning, though, the shutter is snappy and precise, with a distinctive metallic snap that owners describe as deeply satisfying.

Removable Back and Dual-Bayonet Lens Mount

One of the practical improvements over earlier designs was the removable back, which simplified film loading compared to the slide-open backs of some contemporaries. This small detail made the camera more user-friendly in the field, especially for press photographers who needed to reload quickly. The lens mount was a bayonet system with an unusual dual configuration: an inner bayonet for 50mm lenses and an outer bayonet for other focal lengths. This allowed for optimized flange distances and mechanical alignment, contributing to the sharpness and consistency of the Contax lens system. The mount supported a full range of high-performance optics, though specific lens details are not documented in the fact sheet.

Self-Timer and Integrated Control Layout

The Contax III included a self-timer, a feature reportedly present on all II and III models, and likely the first such mechanism on a system 35mm camera. Activated via a lever on the front plate, it allowed for delayed exposures—useful for self-portraits or reducing camera shake in long exposures. The control layout was both innovative and idiosyncratic: a single non-rotating shutter speed dial combined with the film advance knob. This fixed dial required the user to rotate the entire advance knob to select speeds, a design that prevented accidental changes but demanded deliberate operation. There was no room for carelessness—every action was mechanical, tactile, and intentional.

Historical Context

Introduced in 1936 alongside the Contax II, the Contax III was Zeiss-Ikon’s answer to the Leica, developed after the shortcomings of the Contax I. It was positioned as a professional alternative, offering superior speed, build quality, and innovation. Despite its advanced features, it was priced lower than contemporary Leica models, making it an attractive option for working photographers. At the time, it was widely regarded as a legitimate, often superior competitor—so much so that it was frequently considered the definitive professional 35mm system of its era. The integration of the selenium meter was a bold move, showcasing Zeiss-Ikon’s engineering confidence. Production continued until 1942, cut short by the realities of war, but the legacy of the Contax III endured in the reputation of precision and durability it helped establish.

Collectibility & Value

Today, used Contax bodies and lenses generally command lower prices than their Leica equivalents, despite often being mechanically more advanced. A near-mint, serviced Contax III body recently sold for $595 USD, reflecting its status as a desirable but not ultra-rare collectible. Most surviving examples are well-worn, a testament to their use as workhorse cameras rather than shelf ornaments. Common problems include inoperative shutters due to broken straps—a known failure point after decades of dormancy—and fogging in pre-war lenses, which often require professional cleaning. Maintenance is essential: occasional cleaning, lubrication, and adjustment are necessary to keep the camera functional. While modern users often prefer the leaner Contax II for its compactness and lack of a now-obsolete meter, the III remains a favorite among collectors who appreciate its historical significance and engineering ambition.