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It seems, that KMZ has released a prototype Industar-26M lens for SLR cameras initially. Very few samples released in 1955. Focal length - 5 cm, aperture range f2.8 - f16. Focusing range from 0.5 m to infinity. Number of elements/groups: 4/3. Angular field - 45º. Zenit (M39) mount. An ultra rare to find lens.
Lens #550005 opposite from private collection in China. | |
| Industar-26M prototype lens #550005 (SLR). |
PT4305. Prototype Industar-26M (or mysterious "Industar-26") lens for rangefinder cameras already. Very few samples released in 1955-1957. Focal length - 5 cm, aperture range f2.8 - f22. Focusing range from 1 m to infinity. Number of elements/groups: 4/3. Angular field - 45º. Zorki (M39) mount. An ultra rare to find lens.
Sample opposite scanned from Soviet Cameras Catalogue (1969). | |
| PT4305 - Industar-26M prototype lens. |
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PT4310. Short-run preseries lens, released by KMZ in 1957. Seems to be a further evolution of PT4305 lens. Signally changed body design, faceplate of the lens becoming black. Approximately 500 items released in 1957. Very rare to find nowadays.
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| PT4310 - Industar-26M #570183. |
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PT4320. Seems to be an earliest version of regular Industar-26M, released by FED in 1957. Slightly different body finish, big markings on the faceplate. 6-digits serial number without date prefix already, starting from #000001. Metering scale: M1; 1.2; 1.5; 1.7; 2; 2.5; 3; 4; 5; 7; 10; 20; ∞. An earliest so far known lens has s/n #000003 (private coll.).
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| PT4320 - Industar-26M #000144. |
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PT4322. An ultra rare version to find. Seems to be prepared for Korean market in 1958-1959. White faceplate, no serial number at all. More informtaion is needed!
Thanks to Alexander Nezvanov (Moscow) for donation!
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| PT4322 - Industar-26M lens. |
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PT4325. Very regular version of Industar-26M lens. Identical to early PT4320, but with smaller markings on the faceplate already. Appr. 725.000 copies released in 1957- 1959. Please look at the comparison picture between PT4310 (KMZ) and PT4325 (FED) below.
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| PT4325 - Industar-26M #016019. |
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PT4330. Identical to PT4325, but with less wide metering scale's disk (see comparison picture below). Quite common to find.
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| PT4330 - Industar-26M #703080. |
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PT4335. Very regular version of Industar-26M lens. Focusing lever replaced by a large textured ring. Appr. 375.000 copies released in 1959- 1961 (PT4335 + PT4340 +PT4345). An earliest so far known lens has s/n #725823 (SovietCams).
PT4340. Lens identical to PT4335, but with wider aperture settings disk. Known lens has s/n #776219 (SovietCams).
PT4345. Lens identical to PT4335, but with narrow aperture settings disk. Known lens has s/n #941975 (SovietCams). | |
| PT4335 - Industar-26M #725823. |
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PT4350. Less common to find lens. Similar to PT4325 or PT4330, but without focusing lever already. An earliest so far known lens has s/n #618193 (SovietCams).
PT4355. An unique prototype version of Industar-26M lens. Very few samples were released for prototype "ZARYA-3" camera (never produced). Lens #997723 from Yuriy Davydenko (Ukraine) collection.
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PT4355 - Industar-26M prototype lens #997723. | PT4350 - Industar-26M #858404. |
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PT4360. Identical to PT4335, but with new lens markings already. "Industar-26M" shortened to "I-26M", "2.8/52" instead of "1:2.8 F=5cm". No more "No" prefix in serial number (see picture below). An earliest so far known lens has s/n #1111667 (D.Waumans coll.).
PT4365. Identical to PT4360, but with new metering scale, which reminds me another aperture settings: M1; 1.4; 2; 2.8; 4; 5.6; 8; 11; 22; ∞. An earliest so far known lens has s/n #1172628 (Tomasz Artynowski coll.).
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| PT4365 - Industar-26M #1183320. |
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PT4370. Lens identical to PT4165, but with wider textured ring (see comparison picture below). No otherwise different. Approximately 100.000 copies released in total (PT4360 + PT4365 + PT4370).
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| PT4370 - Industar-26M #1950952. |
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PT4375. Very similar to its predecessors, but with few important changes: aperture settings with f-stops already; new aperture range - f2.8 - f16 (f2.8 - f22 on all previous versions); new metering scale: M1; 1.1; 1.2; 1.3; 1.5; 1.7; 2; 2.5; 3; 4; 5; 7; 10; 20; ∞. No otherwise different.
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| PT4375 - Industar-26M #2143946. |
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PT4380. identical to PT4375, but with date prefix in serial number already. Aperture settings with f-stops. Released in 1965-1968. Quantity - unknown. The particular lens opposite was mounted on Fed-2 with s/n #6600619 (SovietCams).
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| PT4380 - Industar-26M #6600092. |
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PT4400. Industar-26M lens for enlarger. Under name "Industar-26M-У". Aperture range f2.8 - f22. Without metering scale at all. Without date prefix in serial number. An earliest so far known lens has s/n #2099430 (Molotok 2011).
PT4405. Industar-26M lens for enlarger. Under regular name "Industar-26M". Aperture range f2.8 - f16. Without metering scale at all. Otherwise no visually different from PT4380. Unknown quantity released in 1966-1968.
PT4410. Identical to PT4405, but under name "Industar-26M-У" again. Aperture range f2.8 - f16. Unknown quantity released in 1966-1968. 6-digits or 7-digits serial number.
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| PT4405 - Industar-26M #6697915. |
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