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
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Zenit 50mm f/1.8 Helios 77M-4 Auto Manual Focus Lens for M42 Screw Mount {52} at KEH Camera