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pdccameras
Joined: 23 Aug 2009
Posts: 825
Location: Putnam, CT
Expire: 2014-08-11
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 Posted: Mon Aug 22, 2011 3:26 am Post subject: SK Jsogon 40mm f/4.5 in Exakta mount |
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pdccameras wrote:
Got this crazy little lens a while back off Ebay. It is an SK Jsogon 40mm f/4.5 in classic kine exakta mount. I seem to remember reading somewhere this was an early wide angle lens designed with a not-so-wide 40mm focal length due to the limitations of the Exakta mount. Or any mount, really before the advent of retro-focus designs. Wasn't Angenieux one of the first optical firms to introduce a retro-focus WA?
Anyway, this diminuitive lens looks like a little jewel. It's front element is so far back in the mount, a lens hood is really unecessary. It perfroms quite well within its limitations! I believe it is a triplet, but it could be a Tessar 4-element design - I'm not sure.
The Jsogon is small, but I wouldn't call it a "pancake" lens as it is just about as tall as it is wide. I would think that a pancake lens should have a much smaller length/diameter ratio.
There was just a single post on here about this lens from 2009. Anyone else have any experience with one these?
Best,
P.
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Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Mon Aug 22, 2011 3:43 am Post subject: |
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iangreenhalgh1 wrote:
Interesting lens, apart from the front aperture ring it looks exactly like an Industar 50-2.
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walter g
Joined: 20 Feb 2010
Posts: 2463
Location: NC, USA
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| Posted: Mon Aug 22, 2011 3:46 am Post subject: |
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walter g wrote:
Wouldn't mind having one in my collection. The Isogon came out in 1951.
Captain Jack has one in his collection.
Really cool lens thanks for sharing.
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Main cameras
Panasonic G5,Nikon J1,Pentax Q10,Sony Nex 6
Minolta MC W SI 2.5/28, MD 2.8/28, MC W SG 3.5/28, MC Celtic 3.5/28, MC W HG 2.8/35, MD Celtic 2.8/35, QE 4/35, Rokkor X 2/45, MC Rokkor X PG 1.4/50, MC Rokkor X PG 1.7/50, MD Rokkor X 1.7/50, MD 2/50, MC Rokkor PF 1.7/55, MC Rokkor PF 1.9/55, Auto Tele Rokkor PG 2.8/135, MC Tele Rokkor QD 3.5/135, TC 4/135, MC Celtic 4/200, MC Tele Rokkor PE 4.5/200
MD 28-70 f3.5-4.8, MD Macro 35-70 f3.5, Md 70-210 f4, MD Rokkor X 75-200 f4.5, MD 100-200 f5.6
Nikon Nikkor 4/20, O Auto 2/35, S Auto 1.4/50..... Miranda Auto 2.8/28, Auto 2.8/35, Auto 1.4/50, Auto EC 1.4/50, Auto 1.8/50, Auto EC 1.8/50,Auto 1.9/50, Auto 3.5/135
Various Soligor,Sun,Fujita,Komura,Spitatone, etc. Lenses
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Mon Aug 22, 2011 3:54 am Post subject: |
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iangreenhalgh1 wrote:
Probably just a coincidence but they sure do look similar:
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walter g
Joined: 20 Feb 2010
Posts: 2463
Location: NC, USA
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| Posted: Mon Aug 22, 2011 4:03 am Post subject: |
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walter g wrote:
Forgot to mention it's a 4/4 design.
A little more info.
http://translate.google.com/translate?js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&sl=auto&tl=en&u=http%3A%2F%2Fspiral-m42.blogspot.com%2F2010%2F09%2Fschneider-kreuznach-jsogon-4045.html&act=url
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Main cameras
Panasonic G5,Nikon J1,Pentax Q10,Sony Nex 6
Minolta MC W SI 2.5/28, MD 2.8/28, MC W SG 3.5/28, MC Celtic 3.5/28, MC W HG 2.8/35, MD Celtic 2.8/35, QE 4/35, Rokkor X 2/45, MC Rokkor X PG 1.4/50, MC Rokkor X PG 1.7/50, MD Rokkor X 1.7/50, MD 2/50, MC Rokkor PF 1.7/55, MC Rokkor PF 1.9/55, Auto Tele Rokkor PG 2.8/135, MC Tele Rokkor QD 3.5/135, TC 4/135, MC Celtic 4/200, MC Tele Rokkor PE 4.5/200
MD 28-70 f3.5-4.8, MD Macro 35-70 f3.5, Md 70-210 f4, MD Rokkor X 75-200 f4.5, MD 100-200 f5.6
Nikon Nikkor 4/20, O Auto 2/35, S Auto 1.4/50..... Miranda Auto 2.8/28, Auto 2.8/35, Auto 1.4/50, Auto EC 1.4/50, Auto 1.8/50, Auto EC 1.8/50,Auto 1.9/50, Auto 3.5/135
Various Soligor,Sun,Fujita,Komura,Spitatone, etc. Lenses
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pdccameras
Joined: 23 Aug 2009
Posts: 825
Location: Putnam, CT
Expire: 2014-08-11
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| Posted: Mon Aug 22, 2011 4:12 am Post subject: |
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pdccameras wrote:
| walter g wrote: |
Wouldn't mind having one in my collection. The Isogon came out in 1951.
Captain Jack has one in his collection.
Really cool lens thanks for sharing. |
Thanks Walter, I would have pegged it as pre-war! I wonder what your other Exakta WA options were in '51? I think that still pre-dates many retro-focus WA's.
I have seen (and drooled over) Cap'n Jack's magnificent Exakta collection. I somehow missed the Jsogon! I'll go check it out again. Thanks for the tip!
Best,
P>
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Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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pdccameras
Joined: 23 Aug 2009
Posts: 825
Location: Putnam, CT
Expire: 2014-08-11
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| Posted: Mon Aug 22, 2011 4:16 am Post subject: |
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pdccameras wrote:
Ian,
Thanks for sharing the pic. They do look similar! Of course, we all know that the Soviet photo industry got a good shot in the arm from all the booty and "guest laborers" the Red Army brought back home after WWII. Maybe this was one of the spoils of war! (the lens does date from about 6 years after the end of the war, but maybe the plans had been hanging around for a while!)
Best,
Paul
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Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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pdccameras
Joined: 23 Aug 2009
Posts: 825
Location: Putnam, CT
Expire: 2014-08-11
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| Posted: Mon Aug 22, 2011 4:24 am Post subject: |
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pdccameras wrote:
Great site, Walter. Thanks! The Jsogon shown there has a slightly different barrel and different knurling. Mine looks like Cap'n Jack's.
P.
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Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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