Helios 44-2. 58mm F/2.0, 

Technical information:

Lens Mount: M42

Focal Length: 58mm

Aperture: 1: 2.0

Aperture range: 2.0-16

Aperture: 6 aperture blades, Manual

Focus range from 0.5m to 10m to infinity

The filter holder: M52x0.75

All pictures are actual, you receive what you see photo in item.

Thank you very much.