Helios 44m-4 lens f2\58mm mount M42 USSR KMZ, for Canon, Nikon, Sony, Zenit
Russian lens Helios-44M-4 58mm f2 is a high-apertured, normal lens with a fixed focal length for cameras with an M42 connection thread.
Specifications: Format: 35mm mirror Type: Constant focal length (fixed) Focus: Manual Focus System: M42 Optical design: 6 elements in 4 groups Focal length: 58mm Aperture: f / 2.0 - f / 16 Petal diaphragm: 6 Diameter of filter thread: 52mm Weight: 300g Length: 42mm Year of production: 1991 Plant: KMZ Product condition. Lenses are clean without scratches and fungus. There are several micro-dusts inside. Focusing works. The diaphragm is malfunctioning, always open.