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176SPACE EXPLORATION472 GOI OB-505 6.3/107 mm %u20ac2.000Space Lens Prototypeno. 73052, 1973, condition A/B %u20ac 4.000 %u2013 5.000An exceptionally rare GOI OB-505 experimental lens, developed by the State Optical Institute in Leningrad during the 1970s for Soviet space-related photographic applications. The massive lens measures approximately 22%u2009cm in height and is finished in characteristic blue paint. It comes with its two original red protective caps and the original fitted wooden transport case bearing the matchingserial number. The OB-505 is associated with the period of the Soviet Almaz military space programme, whose Salyut 3 station was used for photographic reconnaissance during the Soyuz 14 mission in 1974. Only very few examples of this specialised GOI optic are known.473 GOI f. M42 OB-533 4.5/85-210 %u20ac8.000Space Program Salyutno. 73340, 1973, condition A%u2013 %u20ac 16.000 %u2013 18.000An exceptionally rare prototype telephoto zoom lens developed by the Soviet State Optical Institute (GOI) in the 1970s as part of the optical equipment programme for the manned Salyut orbital space stations. The lens features an all-metal construction, a constant f/4.5 aperture and an M42 screw mount. Produced in very small numbers as an experimental GOI development, it was made to very high technical standards and was never intended for commercial sale. The offered example is in mint, apparently unused conditionand comes with both lens caps, tripod adapter, fitted woodentransport case and original test certificate. Also included is anoriginal factory-internal OB-533 folder containing measurements, technical drawings, graphs and handwritten development notes,including information on the offered lens no.%u200973340 and lensno. 73338, sold in our 43rd auction. A rare and well-documented Soviet space-related optical prototype.474 GOI ZM-3 8/600 mm %u20ac20.000Prototype for Salyut Space Programno. 690066, 1969, condition B/A %u20ac 40.000 %u2013 45.000The Salyut 1W was one of the earliest Soviet cameras developed specifically for use in space. Manufactured by Zavod Arsenal inKyiv, it was designed for the Soyuz 4 mission, launched on 14 January 1969. During the same period, the GOI (State Optical Institute) was developing advanced long-focus optics for the Soviet space programme, including a number of highly specialised mirror lenses. Presented here is an exceptionally rare GOI ZM-3 8/600 mm prototype, dating from around 1969 and reportedly developed for use in connection with the Salyut space camera system. The lens represents an early stage in the development of the ZM-3, preceding the later medium-format versions produced in cooperation with Zavod Arsenal for the Salyut and Kiev camera systems. The subsequent ZM-3 was manufactured in very limited numbers in versions with Bayonet V and Bayonet B mounts, the latter intendedfor cameras such as the Kiev-6S and later Kiev-60. The offeredGOI ZM-3 8/600 mm is believed to be the only surviving prototype of this early configuration and ranks among the rarest knownSoviet lenses associated with the space programme.