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188501 Carl Zeiss Jena f. M42 Electric %u20ac2.600Flektogon 2.4/28 mm prototypeno. 991640, 1979, condition A%u2013 %u20ac 5.000 %u2013 6.000Extremely rare and interesting wide angle with M42 Electric mount, in mint condition, very good optics, one of 40 prototypes, produced in 1979. At the time, Carl Zeiss was trying to compete with high quality Japanese wide angles, after some research, the optical calculation of the Flektogon was engineered, it later lead to the Prakticar 2.4/28 mm at the launch of the Praktica B but only 300 units were produced and none went onto the market, the lens comes with an M42/Canon EF adapter and rear cap.502 Carl Zeiss Jena f. M42 Objektiv %u20ac2.0001.5/50 mm prototype V169no. 3746145 M, 1954, condition A%u2013 %u20ac 4.000 %u2013 5.000Very interesting and rare fast lens for M42, special prototype number %u2018V169%u2019 engraved (V for Versuch = research in German), in almost mint condition, optics slightly radioactive in good condition showing a typical yellowish color, note the absence of focusing scale and the blue anodized finish of the barrels, with both caps,exactly this lens is illustrated and tested (with many Zeiss documents) by Mr. M. Herrmann in %u2018Photographica Cabinett%u2019 April 2023,p.41-47.503 Carl Zeiss Jena f. M42 Electric %u20ac2.600Pancolar 1.4/50 mm prototypeno. 991622, 1976, condition A%u2013 %u20ac 5.000 %u2013 6.000Extremely rare fast lens prototype developed under the supervision of Dr. Eberhard Dietzsch in Dresden, innovative compact designed with very high quality, Electric M42 mount, in mint condition, very good optics, unfortunately, this lens never went into production but lead to the development of the later Prakticar 1.4/50 mm, with M42/Canon EF adapter and both caps.504 Carl Zeiss Planar 1.2/85 mm %u20ac1.200*%u201850 Years%u2019no. 6690451, 1982, condition A%u2013 %u20ac 2.400 %u2013 2.800Beautiful and rare fast portrait lens with Contax/Yashica mount celebrating 50 Years of Contax, limited to 1000 units, in absolutely mint condition, %u2018Contax 50 Years%u2019 on the barrels, complete with both caps, pouch, all papers and original maker%u2019s box.505 Zeiss Universal %u20ac800*Turret Finder Beigeno. 4536, 1930s, condition B+ %u20ac 1.600 %u2013 2.000A rare variant of the Zeiss Jena 436/4 finder, distinguished by itsturret lenses finished in beige paint. Preserved in excellent condition, it is the only example of this unusual version we have encountered to date.506 Carl Zeiss %u20ac1.000*Various Technical Lenses1970%u201380s, condition A/B %u20ac 2.000 %u2013 2.400Very interesting set of various Carl Zeiss lenses produced between 1972 and 1989, including aerial high-resolution lenses Topar AS 2/57 mm no.117948 and S-Topar 2/80 mm no.143910, rare micro-reproduction S-Orthoplanar 5.6/105 mm no. 5099560 (front cap), S-Planar 5.6/120 mm no. 5362595 (with platine), rare wide angle head S-Orthoplanar 4/60 mm no. 6346153 (rear cap), 3 %u00d7 high-resolution reproduction lens S-Biogon 5.6/40 mm no. 6222852, no. 6377114 and no. 7153620, high-resolution reproduction lens S-Planar 4/74 mm no. 6522639 and rare fast technical lens S-Planar 1.4/75 mm no. 6785673 (both caps).507 Carl Zeiss Jena Pentacon and %u20ac400Exakta lenses blueprints1950%u201370s, condition A/B %u20ac 800 %u2013 900Very rare set of original %u2018blueprints%u2019 of 20 Carl Zeiss Jena lenses for Pentacon super and Exakta cameras, with handwritten annotationsand drawings, in almost mint condition.508 Zeiss Ikon Throw-In Box %u20ac5001950s, condition B/A %u20ac 1.000 %u2013 1.200Beautiful classic German throw-in film box from Zeiss Ikon, in verygood, original condition, 60%u00d7 33 %u00d7 18 cm painted wood, without key.