Mir-47K 20mm F/2.5 MC
akaМИР-47К 20mm F/2.5 МС
Ultra-wide angle prime lens • Film era • Discontinued • Collectible
Abbreviations
| MC | Multi-layer anti-reflection coating is applied to the surfaces of lens elements. This anti-reflection coating increases light transmission, eliminates flare and ghosting, and maintains color consistence among all lens models. |
Sample photos (6)
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Specification
| Optical design: | |
| 35mm full frame | |
| 20mm | |
| F/2.5 | |
| 10 elements in 9 groups | |
| Pentax K [45.5mm] | |
| 94.5° (35mm full frame) | |
| On Pentax K APS-C [1.53x] cameras: | |
35mm equivalent focal length: | 30.6mm (in terms of field of view) |
35mm equivalent speed: | F/3.8 (in terms of depth of field) |
Diagonal angle of view: | 70.5° |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| 6 (six) | |
| Focusing: | |
| 0.30m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 420g | |
| ⌀82×65mm | |
| Accessories: | |
| Removable front filters are not accepted | |
| Rear screw-type 27mm | |
| <No data> | |
| <No data> |
Source of data
- Manufacturer's technical data.
Manufacturer description
The "МС МИР-47К" lens is an ultra-wide-angle lens designed for "Алмаз" SLR cameras and intended for shooting architectural ensembles, interiors, landscapes on black-and-white and color film; using the "МС МИР-47К" lens, you can shoot in museums, stadiums, etc.
The lens is equipped with an automated pressure diaphragm controlled by the camera mechanism.
The lens has a large angular field, large depth of field and enhanced perspective, which makes it possible to clearly distinguish between the foreground, center and background and focus on various details in the frame.
Fast speed (1:2.5) allows you to shoot in low light conditions.
Light transmission: 0.8. Resolving power, mm-1: at the center of the field: 55, at the edges of the field: 17.
From the editor
Initially, the lens was produced by the Leningrad Optical and Mechanical Association (USSR), but at some point, production was transferred to the Vologda Optical and Mechanical Plant (USSR/Russia). Rough estimates suggest that around 2,000 units were produced.
The lens was originally released as "МС МИР-47К 2,5/20" with the Pentax K mount, but a version with the M42 screw mount ("МС МИР-47М 2,5/20") was developed by the Vologda Optical and Mechanical Plant. It is said that there was also a Nikon F mount version ("МС МИР-47Н 2,5/20").
Since the use of front filters is not possible due to the ultra wide angle of view, the lens accepts M27x0.5 interchangeable filters that are screwed onto the rear element. The following filters were supplied with the lens: УФ-1* (UV), О-2,8* (Orange) and ЖЗ-1,4* (Yellow/Green).
Lenses with similar focal length
| ■Pentax K mount (28) | |||||||||
| Chinon Auto 17mm F/3.5 MC | A | 11 - 9 | 0.25m | ⌀67 | 1985 ● | ||||
| Cosina Voigtlander Color-Skopar 20mm F/3.5 Aspherical SL II | A | 9 - 6 | 0.20m | ⌀52 | 2009 ● | ||||
| Cosina Wide Angle 20mm F/3.8 MC | A | 9 - 8 | 0.20m | ⌀62 | ● | ||||
| Irix 21mm F/1.4 SLR | A | 15 - 11 | 0.30m | -- | 2022 ● | ||||
| Panagor Auto Wide Angle 21mm F/4 | A | 9 - 7 | 0.16m | ⌀82 | ● | ||||
| smc Pentax-A 20mm F/2.8 | A | 10 - 9 | 0.25m | ⌀67 | 1985 ● | ||||
| smc Pentax-M 20mm F/4 | A | 8 - 8 | 0.25m | ⌀49 | 1978 ● | ||||
| smc Pentax 18mm F/3.5 | A | 12 - 11 | 0.25m | -- | 1975 ● | ||||
| smc Pentax 20mm F/4 | A | 12 - 10 | 0.25m | ⌀58 | 1975 ● | ||||
| Ricoh XR Rikenon 18mm F/2.8 | A | 11 - 9 | 0.25m | ⌀67 | 1982 ● | ||||
| Sigma MF 18mm F/3.5 ZEN | A | 10 - 9 | 0.25m | ⌀72 | 1992 ● | ||||
| 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 | ● | ||||
| 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 ● | ||||
| Spiratone Ultra Wideangle 18mm F/3.5 Pluracoat [II] | A | 11 - 9 | 0.25m | ⌀67 | ● | ||||
| Spiratone 20mm F/2.8 Plura-Coat | A | 9 - 7 | 0.20m | ⌀58 | 1983 ● | ||||
| 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 | ● | ||||
| 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 | ● | ||||
| Vivitar Wide Angle 19mm F/3.8 MC (s/n 9xxxxxxx) | A | 9 - 8 | 0.20m | ⌀62 | ● | ||||
| Carl Zeiss Classic Distagon T* 18mm F/3.5 ZE / ZF / ZF.2 / ZK | A | 13 - 11 | 0.30m | E82 | 2008 ● | ||||
| Carl Zeiss Classic Distagon T* 21mm F/2.8 ZE / ZF / ZF.2 / ZK | A | 16 - 13 | 0.22m | E82 | 2008 ● | ||||
| ■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 | ● | ||||