Talk:Konishiroku lenses in Leica screw mount

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Enlarging lenses

I'm very surprised at seeing the following lenses among "Leica screw mount":

  • 75mm f3.5 Hexanon
  • 135mm f3.5 Hexanon
  • 150mm f4.5 Hexar

Aren't these enlarging lenses? Then these should be listed accordingly, in the Konica page or elsewhere, so as not to deceive people into believing that these were made for rangefinder cameras.

As for the 40cm f/5.6 Tele-Hexar, I strongly suspect that this is a barrel lens made for large format cameras, which happens to have the same lens mount diameter as Leica screw mount.

Maybe we can add a small note on the existence of these lenses, but only to make clear that these are not Leica screw mount lenses made for rangefinder cameras, even if they can physically mount.

--Rebollo fr 06:44, 20 January 2009 (EST)

Follow-up: I found a bibliographical source for the 135mm Hexanon. I also found a picture of a Konishiroku Hexar Ser.1 15cm f/4.5 in a chrome finished barrel, which might be for Leica screw mount: [1]. I find no mention of this one anywhere else, and would be extremely interested to hear more about it. --Rebollo fr 16:16, 20 January 2009 (EST)

Hello,

I've emailed you several photos of the 40cm Tele-Hexar lens and some info about who I think currently owns it. Just based upon it's size, it appears to have been made for use on 35mm cameras and would not have a large enough image circle for any larger format film. But I must say it's extremely hard to imagine actually using such a long telephoto on a rangefinder camera, even with accessories that were available for tele work! I believe there were some SLRs that used the 39mm threadmount, too. In fact, I think I have a Zenit that has it. Perhaps this lens was intended for use on those. The flange to film register is different, of course. The fact that it's focal length is noted in centimeters implies to me that it's pretty early, too... Just slightly post WWII at the latest. Weren't millimeters used pretty much standardized after roughly 1950 or so?

I have a 20cm aerial surveillance Rokuoh-Sha Hexar lens myself. Besides being much larger in size overall compared to the 40cm lens, it lacks the smaller f-stop setting that the 40cm seems to have.

As to the other three lenses, I am looking for photos of them. When I made the notations, I was fairly certain they were not strictly enlarging lenses. I have three Konishiroku enlarging lenses in my personal collection, all of which are labeled "E-Hexanon". Besides, in the mid to late 1950s more than a few lenses were used both ways, as taking and enlarging lenses... Even Leica encouraged that in some of their documentation and by designing their own enlargers to share the 39mm threadmount.

That 15cm f4.5 Hexar Ser. 1 you found sounds interesting and I will take a look at it. However, I would not have notated a 15cm lens as a 150mm lens. Perhaps there were subsequent versions.

Hopefully I can find some more of my documentation on the 75mm, 135mm and 150mm lenses. As a rule I have only added items I have either seen in person or seen very good photos of and otherwise been able to confirm reasonably well.

Alan Myers, 26 January 2009.

Thank you very much for your answer! I've answered you directly about the 40cm. Let's just briefly say that it was presumably intended for a reflex housing, and was surely made just after the war. I think it has the same origin as the 15cm, as indicated by the common watermark on the pictures.
I'm interested in hearing about the other lenses. The source I have for the 135mm Hexanon shows a black and chrome lens, with the same finish as the 60mm f/1.2, certainly of the mid-1950s. --Rebollo fr 16:54, 26 January 2009 (EST)