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Helios-44
Sign in to savethumb|Zeiss Biotar optical formula Helios-44 is a Soviet copy of the Carl Zeiss Biotar 58mm ƒ/2 lens produced under the Helios lens brand. The lens was made in the Soviet Union and Russia, primarily for the M42 lens mount.
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thumb|Zeiss Biotar optical formula Helios-44 is a Soviet copy of the Carl Zeiss Biotar 58mm ƒ/2 lens produced under the Helios lens brand. The lens was made in the Soviet Union and Russia, primarily for the M42 lens mount.
==Specifications==
Excerpted from Wikipedia’s “Helios-44” article, available under the CC BY-SA 4.0 licence.