Standard lens for small-format SLR cameras.
Aperture shestilinzovy anastigmat. Coated optics and multi-layer coating. Differs exact match visual and photographic image plane. Is based on the lens Biotar 2 / 58 (Carl Zeiss Jena), in the beginning was called "BTK"- "BioTar Krasnogorsk.
The most massive lens CMH, one of the most popular lenses in the world. Available in many variations and options in several enterprises 1).
In the late 1980's production of threaded MC Helios-44M-4 was transferred from Krasnohorska the Valdai factory "Jupiter " (a specialized company in the software "Krasnogorsky plant"), where later the lenses were separated by resolution with the assignment of different indices in ascending : MC Helios-44M-5, MC Helios-44M-6 and MC Helios-44M-7.
Variants of the Helios-44 is produced also in Belarus at the MSW (BelOMO).
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
Front vertex focal distance: -34.25 mm
Back vertex focal length: 38.05 mm
Distance from first to last the surface: 39.80 mm
Clear aperture of the first surface: Ø29, 5 mm
Clear aperture of the last surface: Ø24, 7 mm
Resolution (0mm/10 mm/20 mm) 3): 46/33/26 lines / mm
Resolution of N (center / edge): Helios-44M-4 - 38/19 lines / mm
Transmittance: Helios-44M-4 - 0,80
Geometric vignetting: 58%
Formula Color: Helios-44M-4 - 10-0-1,5
Closest focusing distance: 0,5 m
Limits the scale of the diaphragms: 1:2 - 1: 22, 1:2 - 1: 16
Number of Diaphragm Blades: 13
Operating distance: 45.5 mm
Dimensions: 42 x 64 mm
Year of development: expected: 1951
Calculation: there is no confirmed data, some sources indicated: DS Hair (GOI)
Design: CMH, there is no accurate data; PA Lapin (Helios-44M-4, Helios-44K-4)
Completion of the ROC:
Helios-44M-4: 1981
Production: large-scale
Years of production: from 1958 (Start)