2/92 Lens Overview

For the opportunity 2/92 lens overview many thanks to Vadim Gadzira.

UPDATED: more info here.

The lens from this review 2/92 is projection lens from the overhead projector 'LETI 60' / 'LETI 60M'. Based instructions for LETI 60M it can be seen that the optical scheme consists of 6 elements in 4 groups.

Important: Photos are signed as Helios 2/92, this is a kind of mistake, do not pay attention to it. Details are in the comments.

Lens view 2/92

View of the 2/92 lens at different focusing distances.

Lens does not have an iris device. This means that the aperture of the lens is always fully open. The lens has a good aperture F / 2.0due to the fact that the diaphragm cannot be closed on a sunny day, at ISO 100 and 1 \ 8000c excerpts I received overexposed pictures on my D700.

Two parts of the Helios 92 2 lens

Two parts of a 2/92 lens. A wormhole (left) and a focusing spindle (right) are visible to create focus.

Also at the lens no focus ring in the usual sense of the word. But the lens can be focused using a primitive spiral wormhole on two parts of the lens. To mount the lens on a modern digital camera, you need to redo it a bit. An adapter ring KP-42 \ N was put on my copy on the back of the lens, while the lens was able to focus from about 1.5 meters to infinity on Nikon cameras, although there is a significant flight for infinity.

Helios 2/92 View of the lens on a modern camera.

2/92 Lens view on a modern camera.

The internally blackening of the frame is very poor, which makes it difficult to use the 2/92 as a regular lens. The lens easily catches 'sun hares', 'sunny rainbows', loses contrast in backlight. 2/92 has a strange yellow-orange enlightenment, which makes the image yellow-green, with the so-called 'Soviet bottle glass' tint. Auto white balance the camera slightly corrects the colors, in general, it turns out something interesting and vintage.

Enlightenment 2/92

Enlightenment 2/92

Due to the long focal length of 90mm and the fast F / 2.0 aperture, it is very easy to achieve a shallow depth of field with the lens. Due to the optical design of 'Biotar', an interesting bokeh pattern can be obtained. The lens turned out to be very sharp. In my opinion, the artistic component of the image of this 2/92 can easily compete with Helios-40-2 85mm F1.5. On the other hand, the lens is very picky about the light sources in the frame.

Example photo on Helios 92 \ 2

Example photo on the lens from the review 92 \ 2

Sample photos on 2/92

All sample photos taken on 2/92 and the camera Nikon D700... Due to the fact that the lens is not intended for ordinary photography, the contrast of the lens suffers greatly, and the unfinished picture looks very poor in most cases. In this review, the photographs have been improved. Mostly the contrast is enhanced when converting from RAW -> JPEG. Reduced the size of images to 3MP and printed data from EXIF.

Personal experience

Despite the dips in image quality, I really liked 2/92. The lens can be found at a very ridiculous price and, having worked a little over the alteration for modern cameras, you can get excellent art photos with a unique pattern.

Example photo on Helios 92 \ 2

Example photo on a lens from a review

All reviews of film projection and filming lenses:

  1. RO3-3M 2/50
  2. RO2-2M 75/2
  3. LOMO RO501-1 F = 100 1: 2
  4. PO 500-1 F9 CM. 1: 2 P
  5. LOMO RO500-1 F = 90 1: 2
  6. LENKINAP RO500-1 F = 9cm 1: 2 P
  7. LOMO RO506-1 F = 80 1: 2
  8. ЛЭТИ-60/60М F=92 1:2
  9. 2/92
  10. F = 92 1: 2
  11. 16KP-1,4 / 65
  12. 35KP-1,8 / 65
  13. 35KP-1,8 / 70
  14. 35KP-1,8 / 75
  15. 35KP-1,8 / 85
  16. 35KP-1.8 / 100
  17. 35KP-1.8 / 120
  18. 35KP-1,8 / 120 (with aperture)
  19. LOMO P-5 F = 90 1: 2
  20. LOMO P-5 F = 100 1: 2
  21. LENKINAP OKS1A-75-1 F=75 1:2 P
  22. LOMO OKS1-22-1 F = 22 1: 2.8
  23. ЛОМО ОКС1-40-1 40/2.5
  24. LOMO OKS1-300-1 F = 300 1: 3.5
  25. LOMO OKS11-35-1 F = 35 1: 2
  26. LOMO W-53 F = 75 1: 2
  27. LOMO W-54 F = 85 1: 2
  28. LOMO OKP4-80-1 F=80 1:1,8
  29. ОКП-6-70-1 F=70 1:1,8
  30. Tair-41 50/2
  31. KO-120 1: 2,1 120mm
  32. KO-90 1: 1,9 F = 9cm
  33. KO-120M 1: 1.8 F = 120mm
  34. KO-120M 120 / 1.8 with a diaphragm and helicoid
  35. KO-120 1: 2.1 F = 12cm
  36. GOZ “KO-140” 1:2,2 F–14cm
  37. Vega-9 2,1 / 50
  40. Schneider Super Cinelux 70/2
  41. Meopta Meostigmat 90/2
  42. Meopta Meostigmat 100/1.7
  43. RO2-2M 75/2 VS LOMO Zh-53 75/2 VS LOMO RO506-1 80/2
  44. Projection aplanates: "Petzvali" and "Richter"

The names of the lenses correspond to their exact spelling on the body.

Catalog modern brand lenses 'Zenitar' и 'Helios' can look at this link.

Comments on this post do not require registration. Anyone can leave a comment. Many different photographic equipment can be found on AliExpress.


The 2/92 projection lens turned out to be very interesting. It can be used for creative purposes. The lens requires rework for use on modern cameras.

A review of another modification of this lens has appeared on Radozhiv - F = 92 1: 2.

Material prepared Arkady Shapoval. Training/Consultations | Youtube | Facebook | Instagram | Twitter | Telegram

Add a comment: Dmitriy



Comments: 113, on the topic: 2/92 Lens Overview

  • Alexander

    Unfortunately, I can no longer remember which helix was used by the donor. The design is the simplest; - can be viewed here https://yadi.sk/d/EzBn1VLzpDA5R An adapter is glued to the internal threaded part and reinforced with pins, then covered with a decorative black self-adhesive film. The outer threaded part is seated on the lens until it stops and is fixed with hot melt glue. External protective cover made of thin plastic. A rubber strip is glued to the front for easy focusing. The design was created only for trial without any hope for something acceptable ... however, the result exceeded expectations and even somewhat surprised.

  • Alexander

    I'm not the most experienced guy with lenses; will someone tell me how to put him on Kenon? I have 1100d.

    • Alexander

      Thank you very much for the instruction :)

    • Glory

      inform the price tag Well, the photo

  • Alexander

    The lens is what you need, for creativity it's the very thing. Sharpness is excellent, here is an example on crop

  • Ivan

    LETI-55 found on sale for 1500r. Who among those present does not know by chance whether the lens will fit him? judging by the technical specifications, the lens almost does not differ from LETI-60

  • anonym


  • Rodion

    One type in Ekb sells this lens in a slightly modified body under the guise of a certain "Helios-lomo 100 / 1.6" from NVG. Of course, this is terrible nonsense - you shouldn't believe it. In a rough craft 92/2, find out how there is nothing to do.
    Moreover, this unscrupulous monsieur uses one of the photographs I have attached here as an example that he allegedly shot with the Sony A99 lens using this lens, which is generally not good. I believe that the remaining examples are also underestimated from other photo resources.

  • Vadim

    Hello :)

    Tell me who knows mount T you can wind on it? Are their diameters accidentally not identical? Or need a boring?

  • Valery Nazarkin

    shot on 1Ds mark II lens without modification, photo from RAW to JPEG with the AUTO button pressed

  • Valery Nazarkin

    another photo taken the same

  • Valery Nazarkin

    and another photo in the same mode

  • Valery Nazarkin


  • Valery Nazarkin


  • Valery Nazarkin


  • Valery Nazarkin

    I will try to shoot the iris from the light with a homemade hood, maybe the result will be better, of course the contrast is weak, but without obvious crime even in sunny weather, although it may be lucky with the instance, although the lens modification is exactly the same as in the review only with the M42 thread on the shank, but here on Sony A7II and A7R cameras ^ the lens starts to soften a lot and the contrast there already drops noticeably ...

    • Rodion

      If he carefully blacken the lens spacers, the result is better.

  • Dmitry Anatolyevich

    Used makromecha, aka makrorail, officially "Prefix PZF". He unscrewed the front ring from the macro fur and inserted it inside the Helios-92 without a helicoid. The lens is securely fastened with the same screw as the ring, and the bellows do not allow the optical axis to shift noticeably. As a result, the lens from the inside rubs the fur a little, which hypothetically can lead to their damage if you focus the lens back and forth for days on end. But it is very convenient focusing, and makes an impression on others. If someone has a macro rail lying around at home, feel free to use this device.

  • Jury

    Near the pond

  • Sandro

    Rodion, what do you think, will Fuji Gfx really shoot with such a lens?

  • Dmitriy

    and you know - the photo with the bear cub in the snow looks exactly like in the old undrawn cartoons of the USSR

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