USSR lens Helios 44M is a six-celled anastigmat with single-layer or multi-layer (MS) clarification based on the Biotar 2/58 lens (Carl Zeiss Jena). According to the optical scheme - planar. One of the most common lenses of the USSR, which were equipped with cameras Zenit mount M42.
Specifications: Manufacturer: KMZ Year of issue: 1978 Lens mount: M42 Focal length:58 Aperture ratio: 2 Thread diameter: 52
Product condition: The aperture operating mode selection button is faulty, the aperture is adjusted only in manual mode. Focusing is OK.