Lens · macro
Olympus OM Zuiko Auto-Macro 20mm f/2
Olympus · from c.1983
Discontinued35mm
High-magnification macro lens for bellows or extension tubes only, giving about 4.2x to 13.6x on the Auto Bellows. It cannot focus to infinity and is not a wide-angle lens. Olympus OM Zuiko Auto-Macro 20mm f/2: 6 elements in 4 groups, 170g.
- Focal length
- 20mm
- Max aperture
- f/2
- Mount
- Olympus OM
- Format
- 35mm
- Elements / groups
- 6 / 4
Known for
- High-magnification macro
- Photomicrography-style work
- Insect and specimen detail
Considerations
- Bellows or extension tube required
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 control3, level 3 of 5
Vignetting control3, level 3 of 5
Distortion control3, level 3 of 5
Silverlog's editorial rating, 1 to 5; five is best. Not lab-measured.
Common issues
- Check for fungus
- Inspect aperture blades
Buying guide
Check aperture operation, focus smoothness and the condition of the glass and coatings.
Specifications
| Mount | Olympus OM |
| Focal Length | 20mm |
| Max Aperture | f/2 |
| Min Aperture | f/16 |
| Weight | 170g |
Optical design
| Formula | Retrofocus |
| Elements | 6 |
| Groups | 4 |
| Coating | Multi-Coated |
Pricing
- Typical used price
- £1500 - £2500
- Mint
- ~£3500
Indicative, no dated source.