Changes: Helios-44

Revision as of 05:40, 25 November 2019

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 Specifications

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-44M - 0.55 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) of non MC versions:
- 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
Optical Resolution (center/edge) of MC versions:
- 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

Links

English

Helios-44 lenses at www.sample-image.com/

Helios-44M-4 58mm F/2 (M42) Review by FilmISH

Helios-44-2 58mm f/2 (M42) Reveiw by BKSPicture

in Russian

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

@@ Line 39: / Line 39: @@
 ** MC Helios-44M-7 - [[m42]] thread
 **MC Helios-44K-4 - Pentax K Bayonet
-*Optical Resolution (center/edge)
+*Optical Resolution (center/edge) of non MC versions:
 **Helios-44 - 35/14 lines/mm
 **[https://helios-lens.com/ Helios-44-2] - 38/20 lines/mm
 **Helios-44-7 - 36/17 lines/mm
 **Helios-44M-4 - 38/19 lines/mm
+*Optical Resolution (center/edge) of MC versions:
-*MC Helios-44K-4 - 42/21 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