(The symbol "x" - mean numerical indices "2", "3", "4", "5", "6", "7" 2) , and the symbol "X" - mean alphabetic codes "M" or "K")
Focal Length: 58 mm (58.60 mm)
Relative aperture: 1:2
Angle of view: 40 ° 28 '
Frame size: 24x36 mm
Number of elements / groups: 6/4
The front vertex focal length: -34.25 mm
Back vertex focal length: 38.05 mm
Distance from first to last the surface: 39.80 mm
Light diameter of the first surface: Ø29, 5 mm
Light diameter of the final surface: Ø24, 7mm
Resolution (0mm/10 mm/20 mm) 3) : 46/33/26 lines / mm
Resolution by specification TU (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-44M-4 - 41/20 lines / mm
MC Helios-44K-4 - 42/21 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
Light transmittance:
Helios-44 - 0.81
Helios-44-2 - 0.82
Helios-44-7 - 0.80
Helios-44M-4 - 0.80
MC Helios-44M-4 - 0.85
MC Helios-44K-4 - 0.85
MC Helios-44M-5 - 0.85
MC Helios-44M-6 - 0.90
MC Helios-44M-7 - 0.90
The geometric vignetting : 58%
Color formula:
Helios-44 (Start) - 10-0-1,5
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-44M-4 - 11-0-0
MC Helios-44K-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
Type of blooming: single layer, chemical, multi-layer (MC)
Minimal focusing distance:
Helios-44 (Start) - 0.7 m
Helios-44 - 0.5 m
Helios-44-x - 0,5 m
Helios-44 X - x - 0,5 m
The limits of the scale of diaphragms: 1:2 - 1: 22, 1:2 - 1: 16
Number of diaphragm blades: 13 (Start), 8, 6 - in the latest versions (Helios-44 X -4, -5, -6, -7)
Operating distance:
"Start" mount - 42 mm
Helios-44 - 45.2 mm
Helios-44-x - 45,5 mm
Helios-44 X - x - 45,5 mm
Mount:
lens with the camera:
Helios-44 (Start) - Bayonet
Helios-44 - M39x1
Helios-44-2 - M42x1
Helios-44-7 - M42x1 4)
Helios-44M-x - M42x1
Helios-44K-4 - bayonet K
Filter thread:
Helios-44 (Start) - SpM40, 5x0, 5
Helios-44 - SpM49, 5x0, 5
Helios-44-2 - M49x0, 75
Helios-44-7 - M49x0, 5
Helios-44 X - x - M52x0,75
For attachment:
Helios-44 (Start) - & Oslash51 mm
Helios-44 - & Oslash51 mm
Helios-44 X - x - & Oslash54 mm
Dimensions:
length of the lens without caps:
Helios-44 (Start) - 58 mm
Helios-44 - 60 mm
Helios-44-2 - 47 mm
Helios-44-7 - 59 mm
Helios-44 X - x - 42 mm
maximum diameter of the barrel:
Helios-44 (Start) - 60 mm
Helios-44 - 60 mm
Helios-44-2 - 60 mm
Helios-44-7 - 62 mm
Helios-44 X - x - 64 mm
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-44M-4 - 0.3 kg
MC Helios-44K-4 - 0.3 kg (258 g)
MC Helios-44M-5 - 0.27 kg
MC Helios-44M-6 - 0.27 kg
MC Helios-44M-7 - 0.27 kg
Year of development: early 1950
Calculation: Data is not confirmed, some sources indicated: DS Hair (GOI)
Design: ASM, there is no accurate data; PA Lapin (Helios-44M-4, Helios-44K-4)
Completion of R & D:
Helios-44-M: 1972
Helios-44M-4: 1981
Production: large-scale
Years of production: from 1958 (Start)
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