KMZ Industar-61 L/Z 50mm f/2.8
The KMZ Industar-61 L/Z 50mm f/2.8 is a 50mm f/2.8 manual-focus lens for the M42 mount, made by KMZ from 1970s-1990s. It uses 4 elements / 3 groups, Tessar. Typical used value is $25 to $100, with most examples near $50, and it adapts to Sony E, Fuji X, MFT, Canon RF, Nikon Z, and L-mount with a plain mechanical adapter.
KMZ Industar-61 L/Z 50mm f/2.8 specifications
KMZ Industar-61 L/Z 50mm f/2.8 specifications
Why collectors want it
A sharp Soviet Tessar-type lens whose distinctive aperture blades produce star-shaped or hexagonal out-of-focus highlights when stopped down. It is very inexpensive and compact. The lanthanum glass version is marked with a radioactivity-related note but is safe to handle.
Mount and adapters for the Industar-61 L/Z 50mm f/2.8
The KMZ Industar-61 L/Z 50mm f/2.8 has a native M42 mount. M42 is a 42mm x 1mm screw thread with a 45.46mm register, introduced in 1949 on the Contax S and later adopted by Praktica, Asahi Pentax, Fujica, Zenit, Yashica, and Chinon. Every mirrorless mount has a shorter register than 45.46mm, so a plain mechanical adapter puts the lens at its design distance and infinity focus is preserved. Plain threaded adapter, no optics. Lenses with an auto-diaphragm pin need either an Auto/Manual switch on the lens or an adapter with an inner flange that holds the pin in. Preset lenses such as the Helios 44-2 have no pin and work on any adapter.
| Camera system | Adapter | Infinity focus | Frames like | Guide |
|---|---|---|---|---|
| Sony E | Plain mechanical, 27.46mm | Yes | 50mm on full frame; 75mm on APS-C (1.5x) | M42 to Sony E |
| Fuji X | Plain mechanical, 27.76mm | Yes | 75mm on APS-C (1.5x) | M42 to Fuji X |
| MFT | Plain mechanical, 26.21mm | Yes | 100mm on Four Thirds (2x) | M42 to MFT |
| Canon RF | Plain mechanical, 25.46mm | Yes | 50mm on full frame; 80mm on APS-C (1.6x) | M42 to Canon RF |
| Nikon Z | Plain mechanical, 29.46mm | Yes | 50mm on full frame; 75mm on APS-C (1.5x) | M42 to Nikon Z |
| L-mount | Plain mechanical, 25.46mm | Yes | 50mm on full frame; 75mm on APS-C (1.5x) | M42 to L-mount |
Frequently asked
What mount is the KMZ Industar-61 L/Z 50mm f/2.8?
The KMZ Industar-61 L/Z 50mm f/2.8 has a native M42 mount. M42 is a 42mm x 1mm screw thread with a 45.46mm register, introduced in 1949 on the Contax S and later adopted by Praktica, Asahi Pentax, Fujica, Zenit, Yashica, and Chinon. With a plain mechanical adapter it fits Sony E, Fuji X, MFT, Canon RF, Nikon Z, and L-mount bodies and keeps infinity focus.
How much is the KMZ Industar-61 L/Z 50mm f/2.8 worth in 2026?
A used KMZ Industar-61 L/Z 50mm f/2.8 typically sells for $25 to $100, with most clean working examples near $50. Basis: eBay sold listings, 2024-2025. This is an estimate, not an appraisal; condition, variant, and service history move the number.
Does the KMZ Industar-61 L/Z 50mm f/2.8 work on Sony E, Fuji X, and MFT?
Yes. M42 has a 45.46mm register and every mirrorless mount is shorter (16mm to 20mm), so a simple M42 adapter reaches infinity with no optics. On a full-frame body the KMZ Industar-61 L/Z 50mm f/2.8 frames as a 50mm lens; on APS-C (1.5x) it frames like a 75mm, on Canon APS-C (1.6x) like a 80mm, and on Micro Four Thirds (2x) like a 100mm. Plain threaded adapter, no optics. Lenses with an auto-diaphragm pin need either an Auto/Manual switch on the lens or an adapter with an inner flange that holds the pin in. Preset lenses such as the Helios 44-2 have no pin and work on any adapter.
When was the KMZ Industar-61 L/Z 50mm f/2.8 made?
KMZ made the Industar-61 L/Z 50mm f/2.8 from 1970s-1990s. That puts the KMZ Industar-61 L/Z 50mm f/2.8 21 years into the life of the M42 mount, which appeared in 1949 on the Zeiss Ikon Contax S (Dresden).
What is the optical design of the KMZ Industar-61 L/Z 50mm f/2.8?
The KMZ Industar-61 L/Z 50mm f/2.8 uses 4 elements / 3 groups, Tessar. Tessar designs use four elements in three groups, a formula known for sharpness stopped down, compact size, and modest maximum apertures.
Which lenses are similar to the KMZ Industar-61 L/Z 50mm f/2.8?
Close alternatives in the same focal class are the Leica Summicron-R 50mm f/2 (50mm f/2, $350 to $900), the Pentacon auto 50mm f/1.8 (50mm f/1.8, $20 to $90), and the Carl Zeiss Jena Pancolar 50mm f/1.8 (50mm f/1.8, $70 to $260). The Pentacon auto 50mm f/1.8 costs less on the used market. The Leica Summicron-R 50mm f/2, The Pentacon auto 50mm f/1.8, and The Carl Zeiss Jena Pancolar 50mm f/1.8 are faster.
Alternatives to the Industar-61 L/Z 50mm f/2.8
Lenses within 15mm of 50mm from other makers, ranked by how close they sit in focal length, aperture, and price.
Side-by-side comparisons
- KMZ Industar-61 L/Z 50mm f/2.8 vs Carl Zeiss Jena Pancolar 50mm f/1.8
- KMZ Industar-61 L/Z 50mm f/2.8 vs KMZ Jupiter-8 50mm f/2
- KMZ Industar-61 L/Z 50mm f/2.8 vs Konica Hexanon AR 50mm f/1.7
- KMZ Industar-61 L/Z 50mm f/2.8 vs Leica Summicron-R 50mm f/2
- KMZ Industar-61 L/Z 50mm f/2.8 vs Minolta MD Rokkor 50mm f/1.4
- KMZ Industar-61 L/Z 50mm f/2.8 vs Pentacon auto 50mm f/1.8
Where this lens fits
Appears in these lists
Related guides
- M42 to Sony EHow M42 screw-mount lenses work on Sony E cameras: the 27.46mm adapter, flanged versus flangeless rings, auto-aperture pins, camera settings, and the APS-C crop.
- Buying checklistA step-by-step checklist for buying used manual lenses: the flashlight test for fungus, haze, and separation, mechanical checks, seller language, grades, and mount traps.