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Helios (lens brand)
Encyclopedia
Photographic lens
A camera lens is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.While in principle a simple convex lens will suffice, in...
, made in the USSR. They were usually supplied with Zenit
Zenit (camera)
Zenit is a Russian camera brand manufactured by KMZ in the town of Krasnogorsk near Moscow since 1952 and by BelOMO in Belarus since the 1970s. The Zenit trademark is associated with 35mm SLR cameras...
cameras and thus usable with other M42 lens mount
M42 lens mount
The M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. It is more accurately known as the M42 × 1 mm standard, which means that it is a metric screw thread of 42 mm diameter and 1 mm thread pitch...
cameras such as the Pentax Spotmatic
Pentax Spotmatic
The Pentax Spotmatic is a range of 35mm single-lens reflex cameras manufactured by the Asahi Optical Co. Ltd., later known as Pentax Corporation, between 1964 and 1976. The original 1964 Spotmatic was one of the first SLRs to offer a through-the-lens exposure metering system, initially using...
. Some later Helios models were built also for the Pentax K mount
Pentax K mount
The Pentax K mount, sometimes referred to as the "PK mount", is a lens mount standard for mounting interchangeable photographic lenses to 35 mm single-lens reflex cameras. It was created by Pentax in 1975, and has been used by all Pentax 35 mm and digital SLRs since...
.
The Helios-44 and Helios-40 are derivatives of the Carl Zeiss
Carl Zeiss
Carl Zeiss was a German maker of optical instruments commonly known for the company he founded, Carl Zeiss Jena . Zeiss made contributions to lens manufacturing that have aided the modern production of lenses...
Biotar optical formula.
List of Helios lenses
| Model | Mount | Focal Length | Maximum Aperture | Minimum Aperture |
|---|---|---|---|---|
| Helios-2 | M42 | 45mm | ƒ/2.0 | ƒ/16 |
| Helios-33 | M42 | 35mm | ƒ/2.0 | ƒ/16 |
| Helios-40 | M39, M42 | 85mm | ƒ/1.5 | ƒ/22 |
| Helios-40-2The 40-2 is not truly a different optical formula, however its filter diameter was increased from 66mm to 67mm, and its tripod collar was made rotatable. This allows for easier mounting on some cameras. Reflective coatings have also been changed. | M42 | 85mm | ƒ/1.5 | ƒ/22 |
| Helios-44There have been many variants of the Helios-44 produced since its inception. | M42, K | 58mm | ƒ/2.0 | ƒ/16 |
| Helios-53 | M42 | 200mm | ƒ/2.5 | ƒ/16 |
| Helios-65 | M42 | 52mm | ƒ/2.0 | ƒ/22 |
| Helios-70 | M42, K | 52mm | ƒ/1.9 | ƒ/16 |
| Helios-77 | M42, K | 52mm | ƒ/1.8 | ƒ/16 |
| Helios-81 | F | 52mm | ƒ/2.0 | ƒ/16 |
| Helios-85 | M42 | 85mm | ƒ/2.0 | ƒ/16 |
| Helios-88 | M42 | 50mm | ƒ/1.9 | ƒ/16 |
| Helios-97 | M42 | 52mm | ƒ/2.0 | ƒ/16 |
| Helios-98 | M42 | 28mm | ƒ/2.8 | ƒ/16 |
| Helios-101 | M42 | 52mm | ƒ/1.8 | ƒ/16 |
| Helios-107 | M42 | 65mm | ƒ/2.8 | ƒ/22 |