The distinct look of this lens has come to. Left: Helios-40 1.5/85mm M39 mount Right: Pentacon Six ‘Zebras’ Biometar 2.8/80 + 120mm to the right.
#M39 helios lens full#
Bokeh is the lens's most commonly-mentioned attribute, with a medium-fast max aperture of f/2 giving plenty of opportunity to blur the background. The Helios-40 at 1.5 is nearly 2 full stops faster than the Biometars and this introduces the unique ‘swirly’ character which makes the Helios-40 a desirable portrait lens to this day. The Helios-44's are generally noted as good lenses, the common allegation of poor quality control notwithstanding. This continued to be Soviet camera industry practice except on the most basic lenses well after West German and Japanese makers went more or less exclusively to automatic apertures. Thus, by twisting the latter ring until it stops, the lens can be conveniently closed down from wide open to a selected f/stop without taking one's eye away from the viewfinder, and vice versa.
dual ring: one ring with click stops and marks for the f/stops controls the position of the preset stop, while one free-moving ring actually controls the aperture, but stops when it gets to the preset stop. Most versions were not automatic, so the aperture control was by preset, aka.
This puts it in a family with a wide variety of common SLR normals.Īll were SLR lenses. Early versions have 13-blade diaphragm and later ones have 8 or 6 blades.Īs a Biotar copy it is a modified Double Gauss design with two groups of three elements each, relatively symmetric, and well corrected for aberrations. The Helios-44 was made for the Zenit m39 mount and then for the m42 mount among others. It is essentially a Zeiss Biotar clone- this was a fast normal for the Exakta mount. The Helios-44 is one of the most mass produced Soviet SLR lenses, a 58mm f/2 normal.
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