Page 174 - Demo

172357 GOI Helios 1.35/75 mm %u20ac7.000prototypeno. 2856, 1939, condition B/A %u20ac 14.000 %u2013 16.000An exceptionally rare and interesting fast cine lens prototype, designed for 35 mm cinema (covering 18 %u00d7 24 mm), produced between May and December 1939. It never entered full production and is regarded as the fastest cine lens of the first half of the 20thcentury. This example has been professionally adapted for Canon EF mount, and is in good cosmetic condition, with%u00a0very good%u00a0optics with only minor cleaning marks. It comes with a rear lens cap. A comparable lens of this type is illustrated in the GOI lens construction book on page 39.05z.358 GOI Helios-40 1.5/8.5 cm %u20ac10.000*prototype OB-57no. 50015008, 1950, condition B/A %u20ac 20.000 %u2013 24.000After the successful start of Kiev camera production in 1947, the GOI factory began developing interchangeable lenses for Kiev cameras. The focus was particularly on lenses that did not already exist in the Zeiss Jena Contax system, but instead offered different focal lengths and faster apertures. It was also important for the Soviet designers to demonstrate their ability to create their own advanced and competitive optical designs. Around 1950, GOI developed its own fast portrait lens, the OB-57 Helios-40 (documented in the GOI Blue Book, p. 50.06). According to our research, only about ten fully completed prototype lenses were produced.However, this lens never entered serial production for Kiev cameras.Only about ten years later it went into large-scale production at KMZ for Zenit cameras, where it became one of the most iconic and highly appreciated vintage portrait lenses up to this day. The offered lens is in fully working condition, with very clean optics and no issues. Included in the sale is a Kiev II camera (serial no. 500051) of the same production period, also fully operational. It is quite possible that this camera was originally used at the GOI factory for testing this prototype lens.359 GOI Jupiter-36 3.5/250 mm %u20ac10.000*OB-424 prototypeno. 690181, 1969, condition A/B %u20ac 20.000 %u2013 24.000In 1968, GOI began developing the OB-424 lens for the Soviet medium-format Salyut camera system, which had already been in serial production since 1957. This design later evolved into the legendary Jupiter-36, which only entered series production around 1975 at the Zavod Arsenal factory for the Salyut-C/Kiev-88 /Kiev-60 camera systems. The lens offered here is a true early prototype. It is noticeably heavier and larger than the later production version and features a different internal optical construction, representing an important transitional development stage before the well-known Jupiter-36 was finalized. The example is in very good condition. The glass is clean, focusing is smooth, and the diaphragm ring operates softly and evenly. It comes with the original front lens cap and a Salyut camera body, most likely also used for testing purposes at the factory. A rare and historically significant GOI prototype.360 GOI f. M42 ZM-2 5.6/350 mm %u20ac6.000*prototypeno. 7573, 1963, condition A/B %u20ac 12.000 %u2013 14.000In 1965, the Soviet camera industry transitioned to the new M42 screw mount, with the Zenit-E becoming the first widely produced camera to adopt this system. Already in 1963, the State Optical Institute (GOI) had developed the first experimental lenses in M42 mount, anticipating this shift. Presented here is one of the earliest known GOI M42 lenses: the 5.6/350 mm ZM-2. The ZM-2 is a mirror (catadioptric) telephoto lens, combining refractive and reflective optical elements to achieve a long focal length in a comparatively compact construction. The present example represents the short, compact prototype version. Based on our research, only a single surviving example of this configuration is currently known. The lens is preserved in very good condition, finished in black paint, and is complete with its original front lens cap and the original GOI factory metal box.356 GOI Helios-81 2/52.4 mm %u20ac6.000*prototypeno. 7046, c.1956, condition A/B %u20ac 12.000 %u2013 14.000Around 1956, the GOI factory developed several fast standard lenses in parallel, including the Orchidea-1, Mercury-1, Helios-65 and Helios-81, intended for both M39 FED rangefinder cameras and M39 Zenit SLR cameras. All were produced in extremely small quantities. The present Helios-81, with a focal length of 52.4 mm,is of particular interest. To our knowledge, no other example is known today, and it is not documented in the %u2018GOI Blue Book.%u2019 It is therefore very likely a previously unrecorded prototype, albeit a fully finished and completed lens. The lens is fully functional and optically as well as mechanically matched to the requirements of Zenit M39 SLR cameras. The focusing scale engraved in the opposite direction provides further indication of its prototype and experimental character. Included in the lot is the original folder from the GOI development department containing technical measurements and optical calculations relating to this lens, further documenting its experimental origin. An exceptionally rare GOI prototype.