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Helios-81 50 mm f/ 2 Lens

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Helios-81 50 mm f/ 2 lens

Helios-81 50 mm f/ 2 lens

Helios-81 50 mm f/ 2 lens

Helios-81 50 mm f/ 2 lens

Optical design

Helios-81 50 mm f/ 2 optical design

Format: 35mm SLR

Type: Prime lens

Focusing: Manual Focus (MF)

Lens mounts: M42, Nikon F (FX, DX)

Optical design: 6 elements in 4 groups (planar)

User reviews (6)

Photos (12)

Tests (0)

Owners (26)

Views (43434)

Average price: $15


Focal lengthMax. apertureMin. apertureBladesMin. Focus (m.)Filter Ø (mm.)Weight (gr/oz)Length (mm/in)

Additional information:

The Helios-81 50 mm f/ 2 (Russian: "Гелиос") is a Kit lens for a 35mm SLR camera Kiev  (Nikon F mount) and with М42 screw mount. Versions with the single and multicoating (MC) existed.

This lens was being manufactured by an "Arsenal" factory in different modifications: Helios-81-avtomat, Helios-81M, Helios-81N (russian letter looks like "H"). Later version was named ARSAT-H 50 mm f/2.

Also there was released sample quantity of Helios-81 52 mm f/2 at KMZ factory with a 12-blade diaphragm and minimum focusing distance 0.4 m.

Personally, i have seen Helios-81H in two modifications. It is interesting that a focal length differs in a short range if you inspect lens labeling for several samples.

This lens has a "swirly bokeh" (background looks like being twisted) but such effect is lighter than with Helios-40 or Helios-44.

According to D.Volosov (russian famous optics specialist) resolution of this lens is (center/10mm/20mm): 52, 37, 27 lp/mm.

Links to online resources:
Posted by: DevilDreams   Date of publication: 17.01.2011

Photos taken with this lens Helios-81 50 mm f/ 2:

Helios-81 50/2
Autor: Harkovsky
5 0 8341

MC HELIOS-81H 2/50
Autor: Harkovsky
5 0 7400

MC HELIOS-81H 2/50
Autor: Harkovsky
5 0 5026

MC HELIOS-81H 2/50
Autor: Harkovsky
5 0 4778

Mechanical quality4.5018
Optical quality4.3717
Pricing / Value4.7717
Overall lens rating

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Owner reviews: Helios-81 50 mm f/ 2

ProfHankD 06.01.2016 07:41:10
Period of use: 36 months


Good USSR IQ -- it has the USSR glass look. In fact, color match between my old USSR lenses is surprisingly good. Really tiny (in Kiev 10/15 mount).


Build is solid, but a little coarse.


Mine is in Kiev 10/15 mount, used on Sony E bodies via a 3D printed adapter.