Helios-94 50mm f/1.8
Arsenal · Contax RF · 1970
Also known as: Helios-94 · Helios 94 · Helios-94 50mm f/1.8 · Helios 94 1.8/50 · Helios-94 1,8/50 · Гелиос-94 · Гелиос 94
Variants & identification
| Variant | Mount | Years | Serial ranges | Production |
|---|---|---|---|---|
| Outer-bayonet, own helical (Kiev-5) | Contax RF (Kiev-5 outer bayonet only) | 1970–1971 | #701538 — 1970, the example sovietcams records for its single version (PT2505) #702123 — 1970, a lens on Kiev-5 #7200838, as its owner captions it on Flickr | No figure published |
- Dates: Abramov gives 1970–1971 at Arsenal, and quotes Volosov's Photographic Optics that the lens was developed in 1970. Sovietcams gives 1969–1971. The Kiev-5 itself was made until 1973, so the Kiev-5s of 1972–73 either carried lenses made earlier or carried something else; no source says which.
- Optics: Abramov gives 6 elements in 4 groups, and so does the allphotolenses database; sovietcams gives 7 in 4. Both agree on four groups. None of these sources gives a section drawing that would settle the element count.
- Focal length and field: sovietcams gives the focal length as "5 cm (5.2 cm)", i.e. engraved 50 mm with an actual focal length near 52 mm, and the field as 45°. Abramov gives 46°, noting other figures of 45° and 44°.
- Resolution, from Abramov: 46/33/25 lines/mm at 0, 10 and 20 mm from the centre; another source he cites gives 42 at the centre and 24 at the edge.
- Weight and filter: Kamerastore lists 229 g and a size of 52 × 45 mm; the allphotolenses database lists 250 g, a length of 53 mm and a 49 mm filter. Neither figure is repeated by a second independent source, so neither is entered in the specification.
- Finish: Kamerastore's product text says the metal body was available in black and silver. Every example pictured in the sources cited here is black, and sovietcams records a single version, so no silver variant is listed. A silver example would be worth recording.
- Replaced or offered alongside? Mike Eckman and Wikipedia say the Kiev-5 first came with the Jupiter-8 NB and later with the Helios-94. Abramov calls the Helios-94 "one of the two standard lenses" of the Kiev-5 and does not say it replaced the other. Both readings are on the record.
How to tell them apart
- The only f/1.8 standard lens made for the Kiev-5; its predecessor on that camera, the Jupiter-8 NB, is an f/2
- Often marked in Cyrillic — ГЕЛИОС-94
Outer-bayonet, own helical (Kiev-5):
- Seats on the OUTER Contax/Kiev bayonet and focuses on a helical of its own, with a distance scale from 0.9 m to infinity and a depth-of-field scale on the barrel; an internal-bayonet 50 (Jupiter-8, Jupiter-8M, Jupiter-3, Helios-103) has no helical of its own and is focused by the camera
- Front ring engraved '1,8/50' with the name and the serial; the examples photographed on Wikimedia Commons are black, with the aperture scale (1.8 to 16) on the front ring and a ridged grey tab at the rear
- Usually offered on a Kiev-5, the only camera it was made for
- Outer-bayonet, own helical (Kiev-5): Sovietcams lists one version only, made by Arsenal for the Kiev-5. Wikipedia adds that it seems not to mount on the older Kiev rangefinders, because the internal bayonet's focus scale is in the way; Wikipedia itself says little information on the lens is available, and none of the sources here describes fitting one to a Kiev-4 or a Contax.
Serial-range notes
- the first two digits
- THE RULE, as for other Arsenal lenses: the first two digits of a Soviet lens serial are the year of manufacture, and the rest is a running number within that year. Both recorded Helios-94 numbers, #701538 and #702123, are six digits beginning 70 and read as 1970. Two numbers are not a register; they say only that surviving lenses were made in 1970, which fits both Abramov's 1970 start and sovietcams' 1969.
- #7102339
- A seven-digit number quoted in an eBay title for a Kiev-5 sold with its Helios-94. The title does not say whether it belongs to the camera or the lens; Kiev-5 bodies carry seven-digit numbers of exactly this shape, so it is most likely the body's, and it is not counted as a lens serial here.
Specifications
- Formula
- Six elements in four groups (Abramov); sovietcams gives seven in four
- Construction
- 4 groups
- Aperture range
- f/1.8–f/16
- Diaphragm blades
- 9
- Min. focus
- 0.9 m
- Years manufactured
- 1970–1971
- Country
- Ukraine
What reviewers say
No reviews aggregated yet — this family is still in the research queue. Written one? We'd love to index it.
History
The Helios-94 is a 50mm f/1.8 that Arsenal made for one camera, the Kiev-5, and for about two years. Abramov dates it to 1970–1971 and sovietcams to 1969–1971; the two serial numbers on record both begin 70.
It exists because of what the Kiev-5 took away. The Contax mount that every earlier Kiev copied is two bayonets: an inner one for standard lenses that have no focusing mechanism of their own and are focused by a helical in the body, and an outer one for wide and long lenses that carry their own. The Kiev-5 kept only the outer bayonet and dropped the body helical, so no standard lens Arsenal already made could be fitted to it. Arsenal answered first with the Jupiter-8 NB, an f/2, and then with this faster lens. Mike Eckman and Wikipedia say the Helios-94 later replaced the Jupiter-8 NB as the camera’s kit lens; Abramov calls it one of the camera’s two standard lenses and says nothing about replacement.
Abramov gives six elements in four groups (sovietcams says seven in four), and quotes D. S. Volosov’s Photographic Optics on why it was made: “In 1970 we developed a faster standard lens, the Helios-94, with an aperture of 1:1.8,” using lanthanum crown glass in the positive elements, which by Volosov’s account raised image quality above the series-made Jupiter-8 while also being faster. Sovietcams gives the real focal length as about 5.2 cm behind the 50mm engraving. It focuses to 0.9 m and stops down to f/16.
There is one version. Sovietcams records a single type, and no differently marked or differently mounted Helios-94 has turned up; one retailer’s text mentions black and silver finishes, but every example pictured in the sources here is black. It was made in one mount only, the outer Contax/Kiev bayonet; Wikipedia’s list of Helios lenses gives no other mount for it, and none of the sources records an M42 or M39 Helios-94.
For a buyer the lens and the camera are usually one purchase: the listings seen for this page all sell the Helios-94 on a Kiev-5, and it has no other native body. Wikipedia says it seems not to fit the earlier Kiev rangefinders, whose inner-bayonet focus scale gets in the way, so it should not be bought on the assumption that it will fit a Kiev-4 or a Contax. Since it focuses itself, check that the helical turns smoothly over its whole travel from 0.9 m to infinity and that the rangefinder agrees with the distance scale at both ends, and expect the usual Soviet variation from one example to the next. Some sellers mislabel the lens (one German listing calls it a “53mm”, the Helios-103’s figure); the engraving reads 1,8/50.
This history is AI-written, from the sources listed at the foot of the page. Where the record is silent it says so rather than filling the gap — but no human wrote these sentences.
Example photos
More sample photos elsewhere
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Sample photo wanted — shot with a Helios-94 50mm f/1.8? We'd love to feature it (with credit).
Live listings
Listings updated 2026-11-09. Links go to the shop or marketplace that carries the item.