MC Helios-44M-5 58 mm F/2.0, USSR Objektiv für Zenit, Pentax. M42 Halterung! s/n: 9211147
M42 mount ! Based on the lens Carl Zeiss Biotar 2/58. Lens mount: M42. (Adapter not included). Focal length: 58mm. Artistic portrait lens with good sharpness and beautiful swirling bokeh. Filter mount: M52x0.75.