Lens · prime
Industar 50-2 50mm f/3.5
KMZ · 1968-1986
Vintage35mm
Compact Tessar-type 50mm f/3.5 for M42: 4 elements in 3 groups, 7 aperture blades, 0.65m minimum focus, 35.5mm filter thread.
- Focal length
- 50mm
- Max aperture
- f/3.5
- Mount
- M42 Screw
- Format
- 35mm
- Elements / groups
- 4 / 3
Known for
- Street photography
- Travel
- Compact kit
Considerations
- Slow f/3.5 aperture
- 35.5mm filter thread is uncommon
- 7 aperture blades
Optical characteristics
Silverlog's editorial rating: our own judgement, not measured data.
Sharpness (wide)4, level 4 of 5
Sharpness (stopped)5, level 5 of 5
Contrast4, level 4 of 5
Flare resistance3, level 3 of 5
CA control4, level 4 of 5
Vignetting control4, level 4 of 5
Distortion control5, level 5 of 5
Bokeh: Smooth for simple design
Rendering: Clinical Tessar sharpness
Colour: Neutral with vintage warmth
Silverlog's editorial rating, 1 to 5; five is best. Not lab-measured.
Common issues
- Focus ring grease stiffness
- Aperture oil
Buying guide
Check the focus and aperture operation.
Specifications
| Mount | M42 Screw |
| Focal Length | 50mm |
| Max Aperture | f/3.5 |
| Min Aperture | f/16 |
| Aperture Blades | 7 |
| Min Focus | 0.65m |
| Filter Size | 35.5mm |
| Weight | 126g |
Optical design
| Formula | Tessar |
| Elements | 4 |
| Groups | 3 |
| Coating | Single Coated |
Pricing
- Typical used price
- £15 - £35
- Mint
- ~£50
Indicative, no dated source.