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Helios lens

Review of the lens Industar-22 3.5 / 52.

The standard lens for the first FED / Zorky / Zenit cameras replaced the similar Industar-10 (aka FED 3.5 / 52). Developed (recalculated) in 1945 by the State Optical Institute (GOI), in 1948 serial production began - completed at the end of the 50s approximately.

Specifications:

  • Focal length 52 mm.
  • The maximum aperture is 3.5.
  • The minimum aperture is 16.
  • The number of aperture blades is 8.
  • The number of lenses / groups is 4/3.
  • The minimum focusing distance is 1 m.
  • Center / edge resolution - 32/22 lines per mm.
  • Light transmission - 0.80
  • Color formula 7-0-0.
  • Working distance 28.8 mm.
  • Fastening - attachments that are put on
  • Optics mount - M39.
  • Weight - 80 grams.

Ergonomics and design:



A feature of the Industar-22 lens for rangefinder cameras is a folding body. In the working position, the lens is pulled out to the stop and rotated clockwise to lock - and in the stowed position it is compressed.



Alas, on Nex mirrorless system cameras, Industar-22 is not completely recessed, it rests on the electronic contact group of the camera.

Focusing is carried out with a leash, or for the front part. Again, when focusing to infinity, the leash does not reach the end (special eyelet) and rests against the adapter ring. The problem is solved by recessed lens inward about 1-1.5 mm.



Mount and adapter:

Industar-22 has a threaded mount М39 / Working Distance (RO) 28.8mm - can be installed on any mirrorless system cameras, including Pentax K-01, while maintaining focus at infinity.


Diaphragm:

The aperture control is placed on the front of the lens, the ring is very thin and you can't grasp it strongly, especially in winter. On the other hand, the opening-closing of the aperture occurs smoothly and not stepwise.



The diaphragm itself consists of eight blackened blades; at diaphragms from 3.5 to 5, the blades form an almost circular opening. From f-5.6 to 16, the hole is already octagonal.

Artistic qualities, photo:

The maximum open aperture of 3.5 does not allow us to call Industar-22 a fast lens - this indicator is rather modest. The optical design of the I-22 is borrowed from Carl Zeiss Tessar 3.5 / 50 - a budget, compact and quite sharp lens. The open diaphragm is working, although according to the passport data, the resolution characteristics are not high. The center of the frame is sharp, along the edges there is a strong drop in resolution.




Considering the age of Industar-22, it holds back light very well, side flares are practically invisible. This is primarily due to the very good internal matt blackening. Chromatic aberrations do not appear.


Color reproduction without obvious distortions - the colors do not go into some kind of obvious and definite shade, but the saturation of the colors is average.

The bokeh is harsh, depending on the variegation and saturation of the background, "scales" - torn pieces, may appear.

Result:

A retro lens with a low aperture of 3.5 for non-trivial artistic tasks. Sharp at 5.6 and quite contrasting. Harsh backlight tolerates, but with no serious loss of contrast. Ergonomics of Industar-22 does not contribute to comfortable work, especially the diaphragm ring causes discomfort.
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