KMZ Drug

Drug

The KMZ Drug is a Soviet 35mm coupled-rangefinder camera manufactured in regular production from 1960 to 1962. It uses an M39 screw lens mount and combines a life-size rangefinder-viewfinder, 50 mm and 85 mm brightlines, a front-mounted shutter release and an unusual trigger-style film advance beneath the camera.[1][3]

The original Cyrillic name is Друг, meaning “friend.” Drug, Droug and Droog are alternative transliterations of the same name. The production camera developed from the Zorki 7 prototype, but Zorki 7 was not the regular production name.[3][4]

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History

Zorki 7 Development

KMZ developed the camera in 1958 as the Zorki 7, a proposed replacement for the ageing Zorki 4. Designers E. V. Solovyev and A. S. Dorofeev created a substantially new camera rather than another direct development of the traditional Zorki body.[3][4]

The prototype already featured a bottom-mounted rapid-wind lever, front shutter release and a reversed film path. Before regular production, the name was changed from Zorki 7 to Drug.

The production Drug differed from the prototype in details including its self-timer, body covering and flash connections. The two flash terminals were moved to the rear of the production camera.[3]

Production

Official KMZ records list 13,625 cameras in 1960, 10,006 in 1961 and 71 in 1962, giving a total of 23,702 units.[2]

Several 59-prefix cameras are documented, including serial 5900066. These appear to represent early or pre-series production before the factory’s officially recorded 1960 output.[3]

The Release Year is therefore entered as 1960, while 1959 should be retained as a possible pre-series production period in listing metadata.

Shutter and Rapid Film Advance

The Drug has a horizontal-travel focal-plane shutter with rubberized cloth curtains. Its shutter-speed sequence is B, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500 and 1/1000 second.[1]

Shutter speeds must only be changed after the shutter has been cocked. The selector must be rotated through the complete marked sequence rather than moved directly between 1/2 and 1/30 second.[1]

A folding lever beneath the body advances the film, tensions the shutter and operates the frame counter. The lever travels laterally across the base and is connected to the transport mechanism through a chain drive.[4]

When the front shutter release is held down, operating the advance lever can fire the camera immediately after each full stroke. The manual states that an experienced photographer can achieve approximately three frames per second at 1/250, 1/500 or 1/1000 second.[1]

Film Loading

Unlike most 35mm cameras, the Drug transports film from right to left. Viewed from the rear, the film cassette is loaded on the right and the fixed take-up spool is positioned on the left.[3][4]

The camera has a hinged rear door rather than the removable bottom plate used by early Zorki cameras. The rewind control is recessed into the underside of the body.

This reversed arrangement is an important identification feature and should be checked when inspecting an incomplete or unmarked body.

Viewfinder and Rangefinder

The optical viewfinder and coupled rangefinder share a single eyepiece. The finder is approximately life-size and contains brightlines for 50 mm and 85 mm lenses.[1][4]

The brightlines are not mechanically parallax corrected. However, the main viewfinder window is positioned directly above the lens, reducing horizontal parallax and leaving mainly vertical displacement at close distances.

The rangefinder is coupled from approximately 1 metre to infinity. Its coupling arm uses a small roller wheel, a construction that differs from the plain-ended arm found on many other Soviet M39 cameras.[1][4]

Flash Synchronization

The Drug has two cable connections on the rear of the camera. One is intended for electronic flash, while the other provides the advance required by single-use flashbulbs.[1]

The factory manual permits electronic flash at shutter speeds from 1/60 through 1/2 second. The main X-sync specification is therefore 1/60 second.[1]

The accessory shoe is a cold shoe without an electrical centre contact. Flash operation should be tested separately because the mechanical shutter can work while the electrical contacts remain defective.

Dimensions and Weight

Published body dimensions are approximately 138 mm wide, 92 mm high and 41 mm deep.[5]

A measured camera body without a lens weighs approximately 622 g. The same measured camera weighs 746 g with its Jupiter-8 attached.[4]

Larger dimensions around 140 × 92 × 72 mm and weights above 800 g generally describe a camera with its standard lens or additional equipment installed.

Lens Kits

The Jupiter-8 50 mm f/2 was the principal standard lens supplied with the Drug. A smaller number of cameras were supplied with the Jupiter-17 50 mm f/2.[1][5]

The original Zorki 7 prototype is also documented with the experimental Mercury-1 50 mm f/2 lens.[3]

The supplied lens should be stored as listing metadata. A Drug fitted with another compatible M39 rangefinder lens remains a Drug.

Combined Variants

Small production differences should remain combined on one main page.

Early examples can have a horizontally ribbed leatherette covering related to that of the Zorki 7 prototype. Most production cameras have conventional black vulcanite-style covering.[3]

A less common version has the Drug logo presented in black against a light-coloured field.[5]

Other minor differences in engraving, covering texture and control finish should be retained as exact_variant, production_period, engraving and finish metadata.

The Drug-2 should not be combined with the standard Drug. It is an extremely rare experimental development with an added selenium exposure meter and was not a regular serial-production variant.[3]

Serial Number Information

Serial numbers are normally year coded, with the first two digits indicating the year of manufacture.

The earliest documented example in the detailed collector classification is serial 5900066. Other early examples include 5900197 and 5900352.[3]

Regular production examples commonly have 60 and 61 prefixes. A 62 prefix is historically possible because KMZ records 71 cameras completed in 1962.[2]

No reliable continuous start-to-end serial range has been established. Serial identification should be combined with the body covering, logo style and production features.

Identification

A standard Drug has:

• An M39 screw lens mount
• A combined life-size rangefinder-viewfinder
• Brightlines for 50 mm and 85 mm lenses
• A shutter release on the front of the body
• A mechanical self-timer below the shutter release
• A folding trigger-style film advance beneath the body
• Two flash connections on the rear
• A rewind control beneath the body
• A hinged rear door
• Right-to-left film transport

The front is normally marked Друг in stylised Cyrillic lettering.

Collector Notes

The chain-driven film transport is the camera’s most distinctive feature, but it is also a common mechanical weakness. Surviving examples can have stiff movement, stretched chains or incomplete shutter cocking.

The shutter should be tested at both slow and fast speeds. The rangefinder, self-timer and both flash connections should also be checked independently.

Because production was limited to 23,702 units, complete and functional examples are considerably less common than contemporary Zorki 4 and Zorki 6 cameras.

For price tracking, useful metadata includes exact_variant, production_period, engraving, finish, included_lens, rapid_advance_condition, self_timer_condition, flash_sync_condition, rangefinder_condition, shutter_condition, accessories, case_included and body_only_or_kit.

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Sources

• [1] KMZ. Drug Camera Brief Description, 1960. https://www.zenitcamera.com/mans/droug/droug.html
• [2] ZENITcamera. KMZ Camera Production Data. https://www.zenitcamera.com/catalog/cameraproduction.html
• [3] SovietCams Archive. Zorki-7, Drug and Drug-2. https://ussrphoto.com/sovietcams/index7a19.html?_m_e_id=22&_menu_i_id=174&tmpl_id=258&tmpl_into=middle
• [4] Mike Eckman. KMZ Drug (1959). https://mikeeckman.com/2023/05/kmz-drug-1959/
• [5] Jean Loup Princelle. The Authentic Guide to Russian and Soviet Cameras. https://fliphtml5.com/nbhs/wemr/The_authentic_guide_to_Russian_and_Soviet_cameras/