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Specification

Source of data

• Manufacturer's technical data.

From the "СОВЕТСКОЕ ФОТО" (No. 11, 1980)

"Arsenal" (Kiev) has started serial production of the "Гранит-11" photographic lens, intended as an interchangeable lens for small-format SLR cameras. This is a lens with a variable focal length, which is smoothly adjusted from 80 to 200mm. Thus, the "Гранит-11" 4.5/80-200 can not only replace a number of telephoto lenses with focal lengths of 80, 85, 105, 135, 180 and 200mm, but also allows you to set any intermediate value.

The relative aperture of 1:4.5 does not change when setting any focal length in the above range. The main advantage of a lens with a variable focal length is that it allows the photographer to accurately choose the frame boundaries and the image scale without moving relative to the photographed object. This is especially important when shooting on reversal film, as well as in reportage shooting.

The optical design of the lens consists of 11 lenses, which are part of four components. Each component performs a specific function.

The first, moving along the optical axis when the lens focusing ring rotates, provides focusing.

The movement of the second component along the optical axis changes the focal length of the lens. The third, also movable, ensures the constancy of the image plane, i.e. the stability of focusing when the focal length changes. The movement of the second and third components is carried out by a complex mechanical device controlled by one ring of changing the focal length.

The fourth, fixed, component is designed to compensate for the aberrations of the previous components. This most complex component, consisting of 5 lenses, provides good correction of the aberrations of the lens optical system over the entire image field in the entire range of focal lengths, which provides high image quality both when focusing at infinity and at finite distances.

The design of the lens barrel is made taking into account the requirements of ease of use and speed of shooting. The barrel has: a focusing ring, a focal length change ring, a preset aperture ring, an executive leash, a slight turn of which sets the specified aperture value. The lens can be stopped down from 4.5 to 22.

The focus, focal length and aperture control rings have knurling of different textures, which allows you to accurately determine the desired ring by touch. A retractable hood is built into the front part of the barrel. It is easy and quick to set both in the working and in the initial position. There is also a thread for attaching M58x0.75 filters. The lens comes with two filters: УФ-1x (UV) and ЖЗ-1.4x (YG).

The appearance of the lens is made taking into account modern aesthetic concepts, and the graphic solution of the lens scales ensures quick reading of data.

When working with the "Гранит-11" lens, focusing the photographed object is conveniently done at the maximum focal length (at the maximum image scale). Then, by changing the focal length, it is easy to choose the required frame boundaries. Focusing is not affected.

The minimum shooting distance is 1.5m.

The bayonet mount of the lens is designed for the "Киев-15" camera. In addition, the kit includes an А-adapter М42X1, which allows the lens to be used with cameras such as Зенит, Praktica, etc., which have a threaded lens mount М42X1 and a working distance of 45.5 mm.

The advantages of the "Гранит-11" lens can be used to the fullest extent with the new "Киев-17" camera, which has a maximum viewfinder field size of 35x22mm.

An adapter with a bayonet mount for the "Киев-17" camera will also be included in the lens kit in the near future.

From the "СОВЕТСКОЕ ФОТО" (No. 9, 1983)

The Гранит-11 variable focal length lens, well known to photography enthusiasts, will be released in 1984 in a set with three adapters: type Н, threaded for Зенит type cameras, and bayonet for Киев-15 cameras.

From the editor

Version of the Granit-11 with an interchangeable mount and preset diaphragm. Produced by the Arsenal Plant (Kiev, USSR).

Resolving power, lines/mm: at the center of the field: 50, at the edges of the field: 20.

Notes

• The lens has an interchangeable mount that is mechanically identical to the T2 interchangeable mount. In the USSR, the following interchangeable mount adapters were produced: "КП-А/42" (T2 - M42x1/45.5), "КП-А/39" (T2 - M39x1/45.2), "КП-А/К" (T2 - Pentax K), "КП-А/Н" (T2 - Nikon F). "КП" is an abbreviation for "Кольцо переходное", which means "Adapter ring".

Lenses with similar focal length range