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on Mar 27, 2020 18:51:53 GMT
Posted: Mar 27, 2020 18:51:53 GMT
I notice there's a 25cm version for sale, and for a considerable sum of cash too. I can't say I'd be a buyer at $849 USD, but then I'm not looking to fill that hole in a collection. Yashinon-R 'K.C.' 25cm f/4: www.ebay.com/itm/273771741140 |
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on Mar 27, 2020 21:07:21 GMT
Last Edit: Mar 27, 2020 21:22:02 GMT by xkaes
This begs TWO questions: What does "K.C." stand for? And was there also a 30CM Super-R made? Anyway, at least one more lens for the list.
I just checked and sure enough there was -- a Yashica Super Yashinon-R 30CM f5.5 -- and MUCH more reasonable in price:
So now there are TWO new lenses to add to the list, though I suspect that the differences with the MM brothers are small.
The deeper you dig!!!
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on Mar 28, 2020 5:45:18 GMT
Posted: Mar 28, 2020 5:45:18 GMT
Judging from the suggested configuration (3/3), that explains the slow f6.3 f-stop. Tomioka made several lenses for Yashica in this style. I have a list -- somewhere. Many were sold under different names, from Vivitar to Soligor.
Well, I can't find the list, but the Tomioka SUPER Yashinon-R (the "R" meaning PRE-SET) teles run from 135mm to 800mm. They first showed up in the 1960's which explains why some are marked CM and others (some the exact same lens) marked MM. Here are the 200mm (AKA 20CM) f4.5 (4/4), followed by the 400mm (AKA 40CM) f6.3 (3/3?), and 800mm f8 (2/1). You can see that they all have the same exact style for the pre-set ring, focusing ring, DOF scale, grip, etc.
The Board lens list shows Super Yashinon-R tele lenses at 135mm, 180mm, 200mm, 250mm, 300mm, 400mm, 600mm, and 800mm. The 600mm and 800mm are not marked as "R", but they should be.
Tokina later produced some of these lenses shortly after Tomioka stopped making them. Since the mechanics of the Tokina lenses (AKA Vivitar, Soligor, etc.) are exactly the same as the Tomioka lenses, they either bought the production gear or stole it in the middle of the night. Tokina made optical changes to the 600mm and 800mm models by adding a second group of elements to the rear of the lenses -- making them 4/2 lenses. This shortened the lenses quite a bit, but the external features and appearance remained identical.
I hope these pictures show up OK. For me, sometimes they do and sometimes they don't -- go figure.
Im liking that 800. |
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on Mar 28, 2020 11:08:09 GMT
Last Edit: Mar 28, 2020 11:25:32 GMT by lumiworx
xkaes ... I'll offer a guess on the 'K.C.', and a page that offers another possibility... The Tomioka company was founded as Tomioka Kōgaku Kenkyūjo, meaning Tomioka Optical Laboratory. There were a number of lenses made that have an additional "Kogaku" block of text on the bezel, so the "K." part is understandable if it refers to the "Optical" portion of their corporate name. The "C." isn't as easy to attribute - but - most lens companies in Japan at the time (and, Germany too) used letters (in red paint) to note coating types. If this was the first of many they'd use over the years, the 'K.C.' might simply mean, Kogaku (i.e., Optical) Coating. YashicaSailerBoy's page with a note on the 'K.C.' marking... for the Yashinon-R 13.5cm
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on Mar 28, 2020 13:20:38 GMT
Last Edit: Mar 28, 2020 13:21:56 GMT by xkaes
That makes complete since as other companies did the same sort of thing, such as "VMC" for Vivitar Multi-Coating, and "EBC" for Fuji's Electron Beam Coating. Many of Tokina's lenses are marked "RMC", and I'm still wondering what the "R" stands for! Any guess?
As to the third picture (of the 800mm), that is only the focusing section of the lens which consists of the diaphragm and focusing mechanisms. The, easily-removable, front section of the lens (detached and not shown) is MUCH larger -- just like the similar 800mm lenses from Nikon and Canon of the same era.
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