Difference between revisions of "Jupiter-8"

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== Description ==
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<div class="floatright plainlinks" style="margin:0px 0px 10px 15px;">
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The Jupiter-8 is a postwar copy of the prewar [[Zeiss]] Sonnar 50mm f/2 for the [[Contax]]. Originally made by [[KMZ]] for [[Arsenal]]'s [[Kiev]] [[Contax]] copy, KMZ later produced its own version in [[L39]] mount for its [[Zorki]] camera series. Odd one out in the story is [[GOMZ]]'s [[Leningrad]] [[rangefinder]], which came complete with a KMZ-built Jupiter-8. It is unclear whether they were custom built or were just nicked from the Zorki warehouse.
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{{Flickr_image
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|image_source= http://www.flickr.com/photos/gatchell/2178999956/in/pool-camerawiki/
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|image= http://farm3.static.flickr.com/2049/2178999956_25b0030417.jpg
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|image_align=  
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|image_text= Jupiter-8 (M39 mount).
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|image_by= Michael Gatchell
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|image_rights=creative commons
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}}
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</div>
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The '''Jupiter-8''' (sometimes marked in Cyrillic, '''ЮПИТЕР-8''') is a 50 mm f/2 lens made by [[KMZ]] in the years after the Second World War.<ref name=J8page>[http://www.zenitcamera.com/archive/lenses/jupiter-8.html Jupiter-8 page] (in Russian) previously at the KMZ Archive website (<nowiki>http://www.zenitcamera.com</nowiki>)] in December 2008.</ref> It is a close copy of the [[Carl Zeiss|Zeiss]] [[Sonnar]], with six elements in three groups; the Soviet Union took the design data for several Zeiss products in War reparations (equipment, and even staff, were also taken to the Soviet Union). The Sonnar had been the standard lens for the [[Contax rangefinder|Contax]], and the J-8 became the standard lens for the [[Kiev]], the Soviet copy of it.  
  
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No complaints about the image quality. Soviet optical factories had a tradition for sharp optics, and this one is no exception. The edges may not always be the bee's knees, but the center can be dead sharp with killing contrast. Is also said to be a good color optic.
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[[KMZ]] originally made the Jupiter-8 for the Kiev; it was made by the Arsenal factory from about 1956. KMZ also made the J-8 in an [[M39]] screw mount for its [[Zorki]] [[rangefinder camera]] series: it first appeared on the [[Zorki 3]] in 1953, and later was the standard lens on the [[Zorki 3S]]. Both versions of the lens appear in a 1949 lens catalogue.<ref name=Cat1949>1949 [http://www.zenitcamera.com/catalog/catalog-lenses-1949.html Soviet lens catalogue], also previously shown at the KMZ Archive.</ref>
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[[GOMZ]]'s [[Leningrad]] rangefinder of 1956-8 also came with a Jupiter-8, made by KMZ.
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The J-8 was originally made with a polished aluminium barrel, though some examples exist in stainless steel. From the 1970s, the lens was made in a black finish (the barrel is still aluminium).
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The lens takes 40.5mm filters. The [[aperture]] ring lacks [[click stops]]: these were introduced in the [[Jupiter-8M]] version in [[Contax rangefinder mount]].
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Optical formula, from [[OPAL]] database
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<!--
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<pre>
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Radii  Thick heig  glass
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26.42  4.2  14.50 TK16
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91.83  0.25 14.10
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17.378 4.0  12.10 TK21
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34.67  3.5  11.40 LK8
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-394.5 1    10.45 TF2
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11.83  3.75  8.40
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stop  1.25  8.35
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-91.83 2.2  8.10  TK21
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-45        10.15
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</pre> -->
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{|class="wikitable"
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! Radii
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! Thickness
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! Height
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! Glass
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|-
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|26.42 
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|4.2 
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|14.50
 +
|TK16
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|-
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|91.83 
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|0.25
 +
|14.10
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|-
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|17.378
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|4.0
 +
|12.10
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|TK21
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|-
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|34.67 
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|3.5 
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|11.40
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|LK8
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|-
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| -394.5
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|1   
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|10.45
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|TF2
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|-
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|11.83 
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|3.75 
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|8.40
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|-
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|stop 
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|1.25 
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|8.35
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|-
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| -91.83
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|2.2 
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|8.10 
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|TK21
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|-
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| -45
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|
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|10.15
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|-
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|}
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==Notes==
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<references />
  
 
== Links ==
 
== Links ==
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* [http://cameras.alfredklomp.com/jupiter8/]
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* A [http://cameras.alfredklomp.com/jupiter8/ Jupiter-8 page] at Alfred's Camera Page
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* Flickr [http://www.flickr.com/groups/jupiter8/ Smaller Jupiter-8 group]
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*[http://www.pentax-manuals.com/repairs/j8service.pdf Servicing Jupiter 8 lenses], by Kim Coxon, at [http://www.pentax-manuals.com/ Pentax Manuals]
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[[Category:Contax rangefinder mount]]
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[[Category:39mm screw mount]]
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[[Category:KMZ]]
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[[Category:Russian lenses]]
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[[Category:Soviet lenses]]

Latest revision as of 05:11, 18 July 2022

2178999956_25b0030417.jpg
Jupiter-8 (M39 mount).
image by Michael Gatchell (Image rights)

The Jupiter-8 (sometimes marked in Cyrillic, ЮПИТЕР-8) is a 50 mm f/2 lens made by KMZ in the years after the Second World War.[1] It is a close copy of the Zeiss Sonnar, with six elements in three groups; the Soviet Union took the design data for several Zeiss products in War reparations (equipment, and even staff, were also taken to the Soviet Union). The Sonnar had been the standard lens for the Contax, and the J-8 became the standard lens for the Kiev, the Soviet copy of it.

KMZ originally made the Jupiter-8 for the Kiev; it was made by the Arsenal factory from about 1956. KMZ also made the J-8 in an M39 screw mount for its Zorki rangefinder camera series: it first appeared on the Zorki 3 in 1953, and later was the standard lens on the Zorki 3S. Both versions of the lens appear in a 1949 lens catalogue.[2]

GOMZ's Leningrad rangefinder of 1956-8 also came with a Jupiter-8, made by KMZ.

The J-8 was originally made with a polished aluminium barrel, though some examples exist in stainless steel. From the 1970s, the lens was made in a black finish (the barrel is still aluminium).

The lens takes 40.5mm filters. The aperture ring lacks click stops: these were introduced in the Jupiter-8M version in Contax rangefinder mount.

Optical formula, from OPAL database

Radii Thickness Height Glass
26.42 4.2 14.50 TK16
91.83 0.25 14.10
17.378 4.0 12.10 TK21
34.67 3.5 11.40 LK8
-394.5 1 10.45 TF2
11.83 3.75 8.40
stop 1.25 8.35
-91.83 2.2 8.10 TK21
-45 10.15


Notes

  1. ↑ Jupiter-8 page (in Russian) previously at the KMZ Archive website (http://www.zenitcamera.com)] in December 2008.
  2. ↑ 1949 Soviet lens catalogue, also previously shown at the KMZ Archive.

Links

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