Contax 645 (1999)

Name: Contax 645
Brand: Contax

Overview

Kyocera's Optical Equipment Group made the Contax 645, an autofocus SLR system camera for the 6 × 4.5cm format. It was aimed at professionals who wanted speed, resolution and reliability along with automation. It was introduced on February 20, 1999, in Japan, and it is the only medium-format camera ever to carry the Contax name. Kyocera built it for roughly six years before shutting down the Contax brand entirely.

The 645 remains among the world's most popular professional cameras for use with medium format film backs, particularly in wedding, portrait, and studio work. Owners report it handles scenics, people, outdoor photography, studio setups, and macro applications equally well. It was never a mass-market tool. It was always positioned as a high-end professional system, where cost was secondary to performance. The body is built around an electronically controlled vertical-travel metal focal plane shutter, reportedly among the most advanced in its class. Speeds run from 32 seconds to 1/4000 second, with a flash sync ceiling of 1/125 second. That range, especially the high end, was exceptional for a medium format SLR at the time.

Specifications

Manufacturer	KYOCERA CORPORATION. Optical Equipment Group.
Product type	SLR autofocus system camera for the 6 × 4.5cm
Format	6 × 4.5cm
Shutter Type	Electronically controlled vertical travel, metal focal plane shutter
Shutter Speeds	Auto: 32~1/4000 sec.
Flash Sync Speed	1/125 second
Lens Mount	Contax 645 Mount
Safety Feature	Constructed such that if the dark slide is not removed, you cannot trip shutter release button

Key Features

Electronically Controlled Vertical-Travel Metal Focal Plane Shutter

This isn't just a spec—it's the heartbeat of the 645’s performance. With speeds stretching from 32 seconds to 1/4000 second, the shutter offers an unusually wide range for a medium format camera, enabling both long exposures and the ability to freeze action in bright daylight with wide apertures. The vertical travel design reduces distortion on fast-moving subjects compared to horizontal shutters, and the metal blades suggest durability under repeated high-speed actuation. According to available documentation, it was considered the most advanced shutter in its class at launch, a claim backed by its smooth operation and reliability in field use.

Dark Slide Interlock Safety Mechanism

A small but critical design touch: the camera is constructed so that the shutter release cannot be tripped if the film back’s dark slide remains in place. This prevents accidental exposure of the film during loading—a common point of failure in medium format workflows. It’s the kind of thoughtful engineering that reflects the 645’s professional orientation, where preventing user error is as important as optical perfection.

Historical Context

The Contax 645 emerged not as part of a broader medium format lineage under the Contax name, but as its sole representative in that domain—a singular effort to bring the brand’s legacy of precision into the 6×4.5cm world. Positioned from the start as a luxury system, it was never intended to compete on price or accessibility. Instead, it stood apart as a high-end professional instrument, built during Kyocera’s final chapter with the Contax brand. Its production span of approximately six years ended not with a successor, but with the brand’s retirement— In that sense, the 645 is both a culmination and an endpoint.

Collectibility & Value

Repair is a known pain point. Multiple sources report that repairs are expensive, and there is no widely recognized specialist akin to Harry Fleenor for Hasselblad systems. One of the few technicians globally capable of servicing the 645 system is reportedly Pro Camera in the United States. Common issues include the camera failing to power on mid-roll, even with fresh batteries. Some users have traced this to dirty electrical contacts, which suggests periodic cleaning is essential for reliable operation. The lack of readily available service options adds risk to ownership, making functional units more valuable than dormant ones.