Mir-1V 2,8/37

Wide-angle lens with coated optics for SLR cameras.

Mir-1 was developed at GOI in 1954 on the basis of the Flektogon optical scheme. At the same time, Mir-1 does not directly copy any foreign samples and is a domestic development.
In 1958, at the World Exhibition in Brussels, Mir-1 was present in a group of Soviet lenses that received the highest award, the Grand Prix.

Mir-1, apparently, was produced in the USSR in the greatest number of variations and modifications. This is not surprising, since the moderate wide-angle is the most useful focal length for the mainstream consumer.

Today we will look at an early version of this M42 threaded lens.

Mir-1 was not produced for rangefinder cameras. The first versions of this lens were for Zenith SLRs with M39 thread and 45.2 mm flange.

The designers quickly came to the conclusion that this type of attachment is futile and switched to the M42 mount with a flange distance of 45.5 mm. At the same time, first of all, all the previously existing optics were transferred to the new mount.

The lenses changed minimally, only the mount and body color. New versions of lenses have become black so as not to dazzle with the reflected light of the sun built-in exposure meters, which have begun to be widely used on new cameras.

Otherwise, the new lenses were very similar to their predecessors. In the marking of the optics, the index “2” was added to the end. This is how Helios-44-2, Industar-50-2, Tair-11-2, Helios-40-2, Jupiter-6-2, and, finally, Mir-1- appeared … .. Uh … .. No. The new World was named Mir-1B..

Why “B”?

There is an opinion, close to the official one, that “B” means “Vologda” [Вологда], since the production of Mirs was transferred to VOMZ, located in Vologda.

I don’t know any other versions. And this, of course, is possible. I will say, however, that I don’t remember any other examples when lenses were marked with letters according to the city of production, although there are many precedents for the production of identical lenses at different enterprises and in different cities of the USSR.

In addition, the emblems of the manufacturer were applied to all Soviet lenses. There is also a VOMZ emblem on Mir-1B. Stylized bow and arrow. Why duplicate the reference to the enterprise?

Well, yes, not the point ….

Optical design:

Focal length: 37mm
Field of view: 60 °
Frame size: 24 × 36 mm
Number of lenses / groups: 6/5
Working distance – 45.5 mm
Aperture ratio: 1: 2.8
Aperture scale limits: 1: 2.8–1: 16
Aperture blades – 10
Aperture adjustment – stepless
Aperture preset – yes

Near focusing limit – 0.7 m
Connections:
lens with camera – M42 × 1
for screw-in bits – M49 × 0.75
for slip-on attachments – ∅51 mm
Filter Mount Location: Front
Resolution according to TU (center / edge): 45/23 lines / mm
Light transmittance: 0.78
Weight – 185 grams
Single-layer enlightenment of barely noticeable yellow-violet color.

Mir-1B is very similar to its predecessor with M39 mount. The visual difference is only in color.

The ring closest to the camera body is responsible for focusing. The shape of the ring is very typical – a hybrid of a nut and a gear.
The ring is narrow enough and too close to the camera. But thanks to the form, it’s okay to use it.

The full stroke of the helicoid is long – at 280 degrees.

The lens is equipped with a preset aperture ring with a special ring.
This is the ring farthest from the camera. It rotates with a clear fixation at the aperture values. But the diaphragm itself does not change.

The middle ring is responsible for directly changing the diaphragm – the widest one. With this ring, you can change the aperture value from 2.8 to the value set by the front preset ring.

The procedure is simple. First, we choose the aperture we want to shoot with. And we expose it with the front ring. We then focus on the open aperture. And then, having caught the moment – without looking up from the eyepiece and not looking at the scales – just turn the middle ring all the way towards closing the diaphragm and press the trigger.
But at the same time, the middle ring, although it is provided with a risk that follows the aperture scale, but when moving the risks from a larger number of apertures to a smaller one – in fact, the diaphragm will close! And vice versa.

This is normal and nothing is broken.

The position of the risks of the middle ring on the aperture scale does not mean anything and it is impossible to set the desired aperture with the middle ring looking at the scale.

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