Mir-20M 20mm F/3.5
akaМИР-20М 20mm F/3.5
Ultra-wide angle prime lens • Film era • Discontinued
- Announced:
- · 1973
- Production status:
- ● Discontinued
- Country of design:
- · USSR (Union of Soviet Socialist Republics)
- Original name:
- · МИР-20М 3,5/20
- · MIR-20M 3,5/20
- Class:
- · Slow full-frame ultra-wide angle prime lens
- · Professional model
- System:
- · Zenit M42 (1965)
Sample photos (25)
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Model history (2)
| ■Mir-20M 20mm F/3.5 akaМИР-20М 20mm F/3.5 | A | 9 - 8 | 0.18m | -- | 1973 ● | |
| ■Mir-20M 20mm F/3.5 MC akaМИР-20М 20mm F/3.5 МС | A | 9 - 8 | 0.18m | -- | 1989 ● | |
Specification
| Optical design: | |
| 35mm full frame | |
| 20mm | |
| F/3.5 | |
| 9 elements in 8 groups | |
| M42 [45.5mm] | |
| 94.5° (35mm full frame) | |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| 6 (six) | |
| Focusing: | |
| 0.18m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 470g | |
| ⌀92×68mm | |
| Accessories: | |
| Removable front filters are not accepted | |
| Rear screw-type 28mm | |
| Not available | |
| <No data> |
Source of data
- Manufacturer's technical data.
Manufacturer description
The "Мир-20М" lens is designed for "Зенит" type SLR cameras with a frame size of 24x36 mm and М42х1 thread for mounting the lens.
The lens has a "jumping" diaphragm mechanism that automatically closes it to a pre-set value when shooting.
The lens is indispensable when shooting with a large coverage of space: architectural, landscape photography and group scenes.
Light transmission: no less than 0,75. Resolving power, lines/mm: in the center of the field: 50; at the edges of the field: 20.
From the editor
The lens was produced by the Krasnogorsk Mechanical Plant (USSR) since 1973.
Some people suggest that the lens was developed from the Carl Zeiss Jena DDR Flektogon 20/2.8 MC. Indeed, the optical designs of the two lenses are very similar. The Mir-20M 20/3.5 was calculated as early as 1968 and developed in 1971-1972, while the first prototype of the Flektogon was ready in 1967 and the design was completed in 1971. There was always some cooperation between the USSR and the GDR, so this assumption cannot be completely ruled out.
Since the use of front filters is not possible due to the convex front element and the ultra wide angle of view, the lens accepts М28х0,75 interchangeable filters that are screwed onto the rear element. The following filters were supplied with the lens: УФ-1х (UV), ЖЗ-2х (Yellow/Green) and О-2,8х (Orange).
Other ultra-wide angle prime lenses in the Zenit M42 system
| ■M42 mount (3) | |||||||||
| Mir-20M 20mm F/3.5 MC akaМИР-20М 20mm F/3.5 МС | A | 9 - 8 | 0.18m | -- | 1989 ● | ||||
| Jupiter-Super-M 20mm F/2.8 MC | A | 10 - 9 | 0.25m | -- | 1998 ● | ||||
| Mir-47M 20mm F/2.5 MC akaМИР-47М 20mm F/2.5 МС | A | 10 - 9 | 0.30m | -- | ● | ||||
Lenses with similar focal length
| ■M42 mount (29) | |||||||||
| Asahi Super-Multi-Coated Takumar 20mm F/4.5 [43952] | A | 11 - 10 | 0.20m | 1971 ● | |||||
| Asahi Super-Takumar 20mm F/4.5 [43951] | A | 11 - 10 | 0.20m | 1968 ● | |||||
| Cosina Wide Angle 20mm F/3.8 MC | A | 9 - 8 | 0.20m | ⌀62 | ● | ||||
| Fuji Photo Film EBC Fujinon-SW 19mm F/3.5 | A | 11 - 8 | 0.30m | ⌀72 | ● | ||||
| Hanimex Wide-Auto 21mm F/3.8 | A | 9 - ? | 0.30m | ⌀72 | ● | ||||
| Mamiya/Sekor SX Auto 21mm F/4 | A | 9 - 8 | 0.45m | ⌀58 | 1974 ● | ||||
| Norita Kogaku Noritar 17mm F/4 | A | 11 - 10 | 0.30m | ⌀72 | 1972 ● | ||||
| Panagor Auto Wide Angle 21mm F/4 | A | 9 - 7 | 0.16m | ⌀82 | ● | ||||
| Ricoh Rikenon Auto 17mm F/4 | A | 11 - 10 | 0.30m | ⌀72 | ● | ||||
| Ricoh Rikenon 21mm F/3.8 | A | 9 - 8 | 0.30m | ⌀72 | ● | ||||
| Sigma MF Ultra-Wide 18mm F/2.8 Multi-Coated II | A | 10 - 9 | 0.25m | ⌀72 | 1984 ● | ||||
| Sigma MF Ultra-Wide 18mm F/2.8 Multi-Coated | A | 11 - 9 | 0.25m | ⌀67 | 1980 ● | ||||
| Sigma MF 18mm F/2.8 Filtermatic | A | 12 - 9 | 0.23m | ⌀77 | 1978 ● | ||||
| Soligor Wide-Auto 17mm F/3.5 [MC] (s/n 1xxxxxxx) | A | 11 - 8 | 0.22m | ⌀72 | ● | ||||
| Soligor C/D Wide-Auto 20mm F/2.8 MC | A | 9 - 7 | 0.20m | ⌀58 | ● | ||||
| Soligor Wide-Auto 21mm F/3.8 (s/n 1xxxxxxx) | A | 9 - 8 | 0.35m | ⌀72 | ● | ||||
| Zenitar 20mm F/2.8 MC akaЗЕНИТАР-К 20mm F/2.8 МС akaЗЕНИТАР-М 20mm F/2.8 МС akaЗЕНИТАР-Н 20mm F/2.8 МС akaЗЕНИТАР-С 20mm F/2.8 МС | A | 10 - 9 | 0.25m | ⌀67 | ● | ||||
| Spiratone Ultra Wideangle 18mm F/3.5 Pluracoat [I] | A | 11 - 8 | 0.22m | ⌀72 | 1979 ● | ||||
| Tokina 17mm F/3.5 RMC Type 2 akaSpiratone Ultra Wideangle 17mm F/3.5 Pluracoat akaTokina SL 17mm F/3.5 | A | 11 - 9 | 0.25m | ⌀67 | 1980 ● | ||||
| Tokina Wide-Auto 17mm F/3.5 RMC Type 1 | A | 11 - 8 | 0.22m | ⌀72 | ● | ||||
| Tomioka Tominon Auto 21mm F/3.5 akaTomioka Chinon Auto 21mm F/3.5 | A | 9 - 8 | 0.30m | ⌀72 | ● | ||||
| Vivitar Auto Wide-Angle 20mm F/3.8 (s/n 22xxxxxx) | A | 9 - 7 | 0.15m | ⌀82 | 1969 ● | ||||
| Vivitar Auto Wide-Angle 17mm F/3.5 (s/n 37xxxxxx) | A | 11 - 8 | 0.22m | ⌀72 | 1976 ● | ||||
| Vivitar Wide-Angle 17mm F/3.5 MC (s/n 37xxxxxx) | A | 11 - 9 | 0.25m | ⌀67 | ● | ||||
| Yashica Yashinon-DX 21mm F/3.3 | M | 8 - 5 | 0.80m | ⌀55 | 1967 ● | ||||
| Yashica Yashinon-DS Auto 20mm F/3.3 | A | 11 - 9 | 0.30m | ⌀72 | ● | ||||
| Yashica Yashinon-DS 21mm F/3.3 | M | 8 - 5 | 0.80m | ⌀55 | ● | ||||
| Carl Zeiss Jena DDR Flektogon 20mm F/4 | A | 10 - 6 | 0.16m | E77 | 1963 ● | ||||
| Carl Zeiss Jena DDR Flektogon 20mm F/2.8 [electric] MC | A | 9 - 8 | 0.19m | E67 | 1976 ● | ||||
| ■Interchangeable mount (6) | |||||||||
| Sigma[-XQ] MF [Widerama] 18mm F/3.2 [Multi-Coated] [YS] akaAccura/Sigma 18mm F/3.2 akaSpiratone 18mm F/3.2 akaSpiratone 18mm F/3.5 | A | 12 - 10 | 0.17m | ⌀72 | 1972 ● | ||||
| Soligor Wide-Auto 21mm F/3.8 (s/n 1xxxxxx) [T-4] | A | 9 - 8 | 0.35m | ⌀72 | 1970 ● | ||||
| Tamron SP 17mm F/3.5 51B [Adaptall-2] | A | 12 - 10 | 0.25m | -- | 1979 ● | ||||
| Tamron SP 17mm F/3.5 151B [Adaptall-2] | A | 12 - 10 | 0.25m | -- | 1984 ● | ||||
| Tamron Auto 21mm F/4.5 [Adapt-A-Matic] | A | 8 - 6 | 0.25m | ⌀82 | 1970 ● | ||||
| Vivitar Auto Wide-Angle 21mm F/3.8 (s/n 37xxxxxxx) [T-4] | A | 9 - 8 | 0.35m | ⌀72 | ● | ||||