Difference between revisions of "Industar 61"

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|image_source= http://www.flickr.com/photos/mr_wood/3086835820/in/pool-camerapedia
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|image_source= http://www.flickr.com/photos/mr_wood/3086835820/in/pool-camerawiki
 
|image= http://farm4.static.flickr.com/3099/3086835820_dd8455922a.jpg
 
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The Industar 61 L/D is possibly the most highly regarded lens for Ukrainian [[Leica]] copies apart from the 35mm Jupiter-12. In an L/D or L/Z version of this lens, the L indicates that the lens has (slightly radioactive) Lanthanum in it, and D indicates M39 mount while Z indicates M42 mount. Most examples are multi-coated and are marked as such with MC. Some Industar 61 L/Z bear the logo of [[LZOS]], probably having been made by that company.
 
The Industar 61 L/D is possibly the most highly regarded lens for Ukrainian [[Leica]] copies apart from the 35mm Jupiter-12. In an L/D or L/Z version of this lens, the L indicates that the lens has (slightly radioactive) Lanthanum in it, and D indicates M39 mount while Z indicates M42 mount. Most examples are multi-coated and are marked as such with MC. Some Industar 61 L/Z bear the logo of [[LZOS]], probably having been made by that company.
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Optical formula from [[OPAL]] database
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<div class="toccolours mw-collapsible mw-collapsed">
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<pre>
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Cистема-Индустар-61  f'=53  2w=46 1:2.8
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                КОНСТРУКТИВНЫЕ ПАРАМЕТРЫ ОПТИЧЕСКОЙ СИСТЕМЫ
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  N      Радиусы      Осевые    Световые  Марки    Показатели преломления
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пов.  кривизны      расст.      высоты  стекол
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                                                L=  .589300  .434050  .656280
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                                            ВОЗДУХ
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  1      19.099        7.500      9.300      СТК9  1.742397  1.761307  1.738057
 +
  2      57.540        1.500      8.000    ВОЗДУХ
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  3    -80.170        1.600      8.000        Ф4  1.624200  1.647216  1.619252
 +
  4      16.106        3.800      7.400    ВОЗДУХ
 +
  5      84.140        1.500      7.600      ЛФ9  1.579999  1.600239  1.575648
 +
  6      19.099        7.000      7.700      СТК9  1.742397  1.761307  1.738057
 +
  7    -40.460                    8.070    ВОЗДУХ
 +
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ПРЕДМЕТ: Удал. размер Y = -23.00000гр.мнсек S0=    .000дптр от вх.зрачка
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ИЗОБРАЖ: Близ. размер Y'=    .00000        плоск. SI=    .000мм  от пл.Гаусса
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ДИАФР. : ND=  4  плоскость    SD=  2.0000 мм  передн. апертура=  9.3000 мм 
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</pre>
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</div>
  
 
==Links==
 
==Links==
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{{Flickr_image
 
{{Flickr_image
|image_source= http://flickr.com/photos/gatchell/2178206777/in/pool-camerapedia/
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|image_source= http://flickr.com/photos/gatchell/2178206777/in/pool-camerawiki
 
|image= http://farm3.static.flickr.com/2322/2178206777_3c0ed29db8_m.jpg
 
|image= http://farm3.static.flickr.com/2322/2178206777_3c0ed29db8_m.jpg
 
|image_align= left
 
|image_align= left
 
|image_text= An Industar 61 L/D (M39 mount)
 
|image_text= An Industar 61 L/D (M39 mount)
 
|image_by=Michael Gatchell
 
|image_by=Michael Gatchell
|image+rights= creative commons
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|image_rights= creative commons
 
}}
 
}}
  
 
[[Category:FED]]
 
[[Category:FED]]
 
[[Category:39mm screw mount]]
 
[[Category:39mm screw mount]]

Latest revision as of 18:16, 12 March 2018

The Industar 61 was produced at the FED factory in Kharkov, Ukraine. It is a "normal" lens for M39 (Leica screw mount) and M42 (Pentax screw mount), with a focal length from 52-55mm, depending on the production run. It has four elements in three groups and the six-blade iris provides a range of apertures from f/2.8 to f/22. It is commonly found on rangefinders made by FED and Zorki. Its brand name Industar refers to the class of similar 4-element/3-group lens constructions of the whole soviet photo-optical industry.

The Industar 61 L/D is possibly the most highly regarded lens for Ukrainian Leica copies apart from the 35mm Jupiter-12. In an L/D or L/Z version of this lens, the L indicates that the lens has (slightly radioactive) Lanthanum in it, and D indicates M39 mount while Z indicates M42 mount. Most examples are multi-coated and are marked as such with MC. Some Industar 61 L/Z bear the logo of LZOS, probably having been made by that company.

Optical formula from OPAL database


 Cистема-Индустар-61  f'=53   2w=46 1:2.8

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

                                             ВОЗДУХ
   1      19.099        7.500       9.300      СТК9  1.742397  1.761307  1.738057
   2      57.540        1.500       8.000    ВОЗДУХ
   3     -80.170        1.600       8.000        Ф4  1.624200  1.647216  1.619252
   4      16.106        3.800       7.400    ВОЗДУХ
   5      84.140        1.500       7.600       ЛФ9  1.579999  1.600239  1.575648
   6      19.099        7.000       7.700      СТК9  1.742397  1.761307  1.738057
   7     -40.460                    8.070    ВОЗДУХ

 ПРЕДМЕТ: Удал. размер Y = -23.00000гр.мнсек S0=    .000дптр от вх.зрачка 
 ИЗОБРАЖ: Близ. размер Y'=    .00000         плоск. SI=    .000мм   от пл.Гаусса
 ДИАФР. : ND=  4  плоскость    SD=   2.0000 мм  передн. апертура=   9.3000 мм  

Links