Jupiter-3

image by Siim Vahur (Image rights)

The Jupiter 3 is an 50 mm f/1.5 lens made in the Soviet Union. It is based on the design of the Carl Zeiss Sonnar 50mm f/1.5 which is a Ludwig Bertele design from 1932.

Initially this lens was called ZK (Sonnar Krasnogorsk) and released in 1948, after rebuilding the Carl Zeiss factory and using remnants of Jena glass. It changed the name to Jupiter-3 around 1950 and by 1954 it was made of Soviet glass. While originally designed for Contax/Kiev mount, it was adapted to Leica Thread Mount/Zorki, Leica M or M42 mounts

Several models exist, made by KMZ (1948-55), ZOMZ (1955-74) or Valdai (1975-88).

On 2018 a new edition of the lens was made in KMZ factory and sold by Lomography-Zenit as New Jupiter 3+ in Leica M39 mount. This new issue of the lens uses multi-coating, is made of aluminium and can focus to 0.7m.

Links

• Servicing Jupiter 3 lenses, by Brian Sweeney, at Pentax Manuals
• Kiev mount Sonnar versions at Sovietcams.com
• LTM/Zorki mount Sonnar versions at Sovietcams.com
• Review of the Jupiter-3 At Phillip Reeve photographic pages

Optical formula from OPAL database

 Cистема-Юпитер-3   f'=51   2w=47  

                 КОНСТРУКТИВНЫЕ ПАРАМЕТРЫ ОПТИЧЕСКОЙ СИСТЕМЫ
  N      Радиусы       Осевые     Световые   Марки     Показатели преломления 
 пов.   кривизны       расст.      высоты   стекол
                                                 L=   .589300   .434050   .656280

                                             ВОЗДУХ
   1      33.000        4.660      17.100      БФ16  1.670899  1.689317  1.666790
   2     223.200         .280      17.000    ВОЗДУХ
   3      18.520        6.260      14.650      БФ16  1.670899  1.689317  1.666790
   4      40.960        3.490      13.700       ЛК8  1.470793  1.479370  1.468733
   5    -374.430        1.050      13.000       ТФ4  1.739795  1.775239  1.732434
   6      11.832        8.900       9.700    ВОЗДУХ
   7     275.690        1.500       9.900        Ф1  1.612800  1.634729  1.608068
   8      23.540        8.450       9.900      БФ16  1.670899  1.689317  1.666790
   9     -11.413        1.700       9.940      ТК23  1.589096  1.601260  1.586244
  10     -58.860                   12.150    ВОЗДУХ

 ПРЕДМЕТ: Удал. размер Y = -23.30000гр.мнсек S0=    .000дптр от вх.зрачка 
 ИЗОБРАЖ: Близ. размер Y'=    .00000         плоск. SI=    .000мм   от пл.Гаусса
 ДИАФР. : ND=  6  плоскость    SD=   7.7600 мм  высота на диафр.=   9.4000 мм