Belomo INDUSTAR 69
A compact Soviet 28mm f/2.8 pancake lens with a unique flange design, made for Chaika half-frame cameras.
Overview
The Belomo Industar-69 is a 28mm f/2.8 lens made in the Soviet Union in the late 1960s and early 1970s. It is a compact, lightweight pancake built for the Chaika-2, Chaika-2m, and Chaika-3 half-frame 35mm cameras. The optical design is simple and inspired by the Tessar formula. It has still gained attention as a vintage alternative to more expensive pancake lenses like the Fujinon 27mm f/2.8. The aperture ring faces front, and the focusing ring is one some users find awkward but functional.
Specifications
| Focal Length | 28mm |
| Maximum Aperture | f/2.8 |
| Mount | M39 |
| Minimum Focusing Distance | 0.80m |
| Length (from flange) | 18/19mm |
| Filter Size | 22.5mm |
| Flange Distance | 27.5mm |
Design
The Industar-69 is a pancake with a simple layout based on the Tessar formula. The aperture ring faces front, and the build is compact and low-profile. The flange distance is non-standard, so the lens typically needs a modification, commonly called a "focus fix," to reach infinity focus on modern mirrorless cameras.
Context
Production is estimated at no fewer than two million units. The Industar-69 was part of a Soviet-era effort to supply affordable, functional optics for consumer cameras. It was designed specifically for the Chaika series of half-frame 35mm cameras.
Market
Listings show the Industar-69 selling individually for around $60 - $70, with some units advertised as serviced. Because of the non-standard flange distance, a focus modification is often necessary for mirrorless systems. The process is well documented, and video tutorials are available online. Its rarity is debated, and some people ask whether it is a rare prototype. The high production numbers suggest it is not.
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