Retro Foto House - Few words about gorgeous helios 77m-4 1.8/50mm vitage lens. Produces very beautiful swirly bokeh, one of the swirliest among helios family(except helios 40) Main technical specs: Maximum-minimum aperture
Amazon.co.jp: OLD LENS* MC HELIOS-81H 50mm/f2 NIKON MOUNT OVERHOLLED : Electronics