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Helios-44 is a series of standard lenses for SLR cameras, produced in Soviet Union by KMZ, MMZ, Jupiter from 1958 until 1999; it is considered to be one of most mass produced lenses in the world. Based on the lens Biotar 2 / 58 , at the beginning was called "БТК" - "БиоТар Красногорский" (BioTar Krasnogorski). A fast 6-element anastigmat, it was available in both single-coated and multi-coated versions.


The name of Helios lenses are usually writen as Helios-44X-N, where X -is the index of lens mount (M for m42 thread, K for Pentax K bayonet, Д for Zenit-D bayonet) and N is a optical resolution index 2, 3, 4, 5, 6, 7 (the higher number the higher is an optical resolution of lens).

Technical SpecificationsEdit

Lens-Helios-44m5

Helios 44M-5 by KMZ

Helios-44-formula

Helios 44. Optical Scheme

  • Focal Distance: 58mm (may vary in real)
  • Optical Formula: 6 elements in 4 groups.
  • Aperture Range: f/2 - f/16. (f/22 later)
  • Angle of View: 40°28
  • Geometric Vignetting: 58%
  • Minimum Focusing Distance
    • Helios-44 (Start) - 0.7 m
    • Helios-44 - 0.5 m
    • Helios-44-N - 0.5 m
    • MC Helios-44X-N - 0.5 m
  • Number of Aperture Blades
    • Helios-44 (Start) - 13
    • Helios-44 -8
    • Helios-44-N -8
    • MC Helios-44X-N - 6
    • MC Helios-44M-7 - 6
  • Filter Diameter:
    • Helios-44 (Start) - M40.5x0.5
    • Helios-44 - M49.5x0.75
    • Helios-44-2 - M49x0.75
    • Helios-44-7 - M49x0.75
    • MC Helios-44X-N - M52x0.75
    • MC Helios-44M-7 -M52x0,75
  • Lens Mount:
    • Helios-44 (Start) - Zenit Start Bayonet
    • Helios-44 - m39 SLR thread
    • Helios-44-2 - m42 thread
    • Helios-44-7 - m42 thread (Originaly designed for the cameras line of ZENIT-7, and because of the special aperture drive system can be installed only on these cameras via an adapter - thread-bayonet ring).
    • MC Helios-44X-N - m42 thread
    • MC Helios-44M-7 - m42 thread
    • MC Helios-44K-4 - Pentax K Bayonet
  • Optical Resolution (center/edge)
    • Helios-44 - 35/14 lines/mm
    • Helios-44-2 - 38/20 lines/mm
    • Helios-44-7 - 36/17 lines/mm
    • Helios-44M-4 - 38/19 lines/mm
  • MC Helios-44K-4 - 42/21 lines/mm
    • MC Helios-44M-4 - 41/20 lines/mm
    • MC Helios-44M-5 - 41/20 lines/mm
    • MC Helios-44M-6 - 45/25 lines/mm
    • MC Helios-44M-7 - 50/30 lines/mm
  • Transmittance
    • Helios-44 - 0.81
    • Helios-44-2 - 0.82
    • Helios-44-7 - 0.80
    • Helios-44M-4 - 0.80
    • MC Helios-44K-4 - 0.85
    • MC Helios-44M-4 - 0.85
    • MC Helios-44M-5 - 0.85
    • MC Helios-44M-6 - 0.90
    • MC Helios-44M-7 - 0.90
  • Color Formula
    • Helios-44 - 10-0-1.5
    • Helios-44-2 - 10-0-1.5
    • Helios-44-7- 10-0-1.5
    • Helios-44M-4 - 10-0-1.5
    • MC Helios-44K-4 - 11-0-0
    • MC Helios-44M-4 - 11-0-0
    • MC Helios-44M-5 - 11-0-0
    • MC Helios-44M-6 - 11-0-0
    • MC Helios-44M-7 - 11-0-0
  • Weight
    • Helios-44 (Start) - 0.23 kg
    • Helios-44 - 0.23 kg
    • Helios-44-2 - 0.23 kg
    • Helios-44-7 - 0.35 kg
  • Helios-44M-4 - 0.3 kg
  • MC Helios-44K-4 - 0.3 kg
    • MC Helios-44M-4 - 0.3 kg
    • MC Helios-44M-5 - 0.27 kg
    • MC Helios-44M-6 - 0.27 kg
    • MC Helios-44M-7 - 0.27 kg

LinksEdit

English


in Russian

  1. http://www.zenitcamera.com An oficial site of KMZ Original descripion and Tech specs.
  2. http://www.photohistory.ru/ Helios 44 on "Stages of development of domestic fotoapparatostroeniya" site