- This article is about a photographic lens. For other articles using a similar graphic abbreviation in the title, see GP .
ZM - pronounced "The Em " ( rus. ) [1] - a family of Soviet photographic mirror lenses, created on the basis of scientific research of prof. Maksutova . It is the second generation of mirror-lens photo lenses after the MTO .
The name is “Mirror M Axutov” or “Mirror-Meniscus [2] Lens ”.
Long-focus lenses of the ZM family are designed for single-lens reflex cameras .
The use of a mirror - meniscus design made it possible to reduce the length and weight of the lenses in comparison with the lens .
Mirror-lens (“ZL”) “ZM” lenses do not have diaphragm controls, the value of the relative aperture is constant.
The focus ring is “overrun”, this is necessary so that when the temperature changes relatively “normal”, the lens does not lose the ability to focus on the extreme values of the distance scale (infinity). A side effect of this design solution is the ability to mount lenses on cameras with a slightly longer working distance than 45.5 mm, without losing focus on “infinity” (for example, on cameras with a Nikon F mount , where the working distance is 46, 5 mm).
In the designations of lenses, “ MS ” means multilayer enlightenment ; " A " - the use of a removable adapter .
Content
Lineup
| Lens | Focal distance | Relative solid hole | Lens field of view | Mount light filter | MDF | Weight | Dimensions: Diameter × length | Mount / The size frame | Manufacturer/ Year release |
|---|---|---|---|---|---|---|---|---|---|
| ZM-1 prototype | 500 | 8.0 | 5 ° | 2 kg | 24 × 36 mm | Not serially produced GOI 1958 KMZ 1960 | |||
| ZM-3 prototype | 600 | 8.0 | 24 × 36 mm | Not serially produced GOI 1969 | |||||
| ZM-3 medium format | 600 | 8.0 | 7.5 ° | M52 × 0.75 (rear) | 6 m | 2.2 kg | Bayonet B Bayonet B 60 × 60 mm | GOI Arsenal factory 1969-1986 | |
| ZM-4A | 500 | 6.3 | 5 ° | M42 × 1 / 45.5 replaceable “A” adapter 24 × 36 mm | LZOS 1975 | ||||
| ZM-5A | 500 | 8.0 | 5 ° | M77 × 0.75 | 4 m | 1,225 kg | 94 × 152 mm | M42 × 1 / 45.5 replaceable “A” adapter 24 × 36 mm | LZOS 1975—? |
| MS ZM-5A | 500 | 8.0 | 5 ° | M77 × 0.75 | 4 m | 1,225 kg | 94 × 152 mm | M42 × 1 / 45.5 replaceable “A” adapter 24 × 36 mm | LZOS ? |
| MS ZM-5CA | 500 | 8.0 | 5 ° | M72 × 0.75 | 4 m | 0.62 kg | 83 × 139 mm | M42 × 1 / 45.5 24 × 36 mm | LZOS 1984-? |
| ZM-6A | 500 | 6.3 | 5 ° | M95 × 1 | 6 m | 1.4 kg | 113 × 163 mm | M42 × 1 / 45.5 replaceable “A” adapter 24 × 36 mm | LZOS 1979-? |
| MS ZM-6A | 500 | 6.3 | 5 ° | M95 × 1 | 6 m | 1.4 kg | 113 × 163 mm | M42 × 1 / 45.5 replaceable “A” adapter 24 × 36 mm | LZOS 1985-? |
| ZM-6B medium format | 500 | 8.0 | Bayonet B 60 × 60 mm | Arsenal factory | |||||
| MS ZM-7 | 300 | 5,6 | 8 ° | M67 × 0.75 | 2.5 m (1.7 m) | 0.47 kg | 76 × 81 mm (73 × 78 mm) | Bayonet K 24 × 36 mm | AOMZ , LZOS ? |
Light filters
Complete with “ZM” lenses for small format (24 × 36 mm) was a set of 4, or an extended of 5 (only with “ZM-7”) light filters . This set of filters was very popular with Soviet lenses, and is basic. (In parentheses are the old names until 1974):
- UV-1 × (ZhS10 or ZhS-12)
- O-2.8 × (OS-12 or OS-14)
- ZhZ-2 × (ZhZS-9)
- "N-4 × " ("NS-7" or "NS-8")
- "N-2 × " (only with the lens "ZM-7")
The same composition of a 4-piece set of optical filters had lenses “MTO-500A”, since at least 1970.
Rubinar lenses also have filters from this set, but in various truncated versions, with the exception of the Rubinar 10/1000 lens, in which a set of small (rear) M35.5x0.5 filters consists of 5 pieces and is similar to the set “ ZM-7. "
Interesting Facts
- The ZM lenses had the USSR quality mark.
- The MTO-11 lens differs from other MTO lenses in that it has a constructive and optical design like that of the ZM family of lenses.
- Lenses with adapter “A” are more compatible with modern cameras, not only because you can install the mount connector for different cameras, but also because the “A” adapter protrudes significantly behind the rear wall of the lens and, therefore, the camera’s flash compartment does not abut lens.
See also
- "MTO" (mirror meniscus lens)
- Rubinar (mirror-lens)
- Reflector (Mirror Telescope)
Literature
- Sparrow P. S. To help the amateur photographer. - Minsk: Polymya, 1993.
Notes
- ↑ " ZM " is written in Latin
- ↑ Meniscus is a relatively thin convex-concave lens .
Links
- Stages of development of domestic camera manufacturing. Lens "ZM-1", 8/500, GOI, KMZ
- Stages of development of domestic camera manufacturing. Lens "ZM-3", 8/600, GOI
- Stages of development of domestic camera manufacturing. Lens “ZM-3” (medium format), 8/600, GOI, Arsenal
- Stages of development of domestic camera manufacturing. Lens "ZM-4A", 6.3 / 500, LZOS
- Stages of development of domestic camera manufacturing. Lens “ZM-5A”, “ZM-5CA”, 8/500, LZOS
- Stages of development of domestic camera manufacturing. Lens “ZM-6A”, MS “ZM-6A”, 6.3 / 500, LZOS
- Stages of development of domestic camera manufacturing. Lens “ZM-7”, 5.6 / 300, AOMZ, LZOS
- ZM-1 lens on zenitcamera.com
- “ZM-5A” lens, review and sample photos