Schneider-Kreuznach G-Claron 150mm f11

[Thierry Schreiner]

Hi to all,

Just wanted to know if anybody of you has come across a Schneider-Kreuznach G-Claron 150mm f11 ? (lens marked 1:11/150)


I just got one lying in front of me. Serial number 11 787 795. So supposedly it should be a Dagor type.

Any info is appreciated.


Thank you in advance for your input and best regards


Thierry Schreiner

[ic-racer]

Can you post a picture of it? What is the coverage?

[Thierry Schreiner]

Hi,



No idea yet about the coverage, as i just got the lens today.

Outside diameter of the front and rear lens group: 31,5mm.
No filter thread. It came in a late series 150mm G-Claron barrel.

Mounting thread of the front and rear lens group: 29,5mm. So it could fit a size 0 shutter.




Best regards

[Dan Fromm]

Thierry, you could ask Schneider. They've replied to similar inquiries.

Have you counted reflections? That's the best way to tell a dagor type from a plasmat type.

Cheers,

Dan

[Luis-F-S]

My Dagor type G-Claron is f9. Has the Dagor reflections.

L

[Dan Fromm]

My Dagor type G-Claron is f9. Has the Dagor reflections.

L

Focal length and serial number?

[lassethomas]

Just received a few lenses that I found for a fair price at an auction site.

Among them a Schneider G-Claron 1:11/150.




Probably from an old repro camera, it came in a barrel mount.
It's very small and light and fits nicely in a #0 shutter.



Compared to a 150 mm f9 G-Claron it is smaller (if that's possible ), and could well be a half stop slower seen from the front.

I've tried to find some info on the net but came up with more or less nothing. There is a G-Claron WA that is f/11 but this is not marked as such.
And the WA seems to be larger.

Any info or knowledge is appreciated

[Dan Fromm]

There are two versions of G-Clarons, the earlier dagor types and the later plasmat types.

I have a dagor type 150/9 G-Claron with a higher serial number than yours so yours should be a dagor type. There are two ways to check. The dagor type's front filter threads are M32.5x0.5, the plasmat type's are M35.5x0.5. A dagor type cell will show two strong reflections (from air-glass interfaces) and two weak reflections (from glass-cement-glass interfaces). A plasmat type cell will show four strong reflections and one weak. The weak reflections can be hard to see.

I suspect, could be mistaken, that your "11" is an engraving error.

I also suspect that your lens' cells have been remounted in a newer barrel. Your barrel is the new type that was introduced with the plasmat type G-Clarons. But I could be mistaken about when the new type barrel came in.

[lassethomas]

There are two versions of G-Clarons, the earlier dagor types and the later plasmat types.

I have a dagor type 150/9 G-Claron with a higher serial number than yours so yours should be a dagor type. There are two ways to check. The dagor type's front filter threads are M32.5x0.5, the plasmat type's are M35.5x0.5. A dagor type cell will show two strong reflections (from air-glass interfaces) and two weak reflections (from glass-cement-glass interfaces). A plasmat type cell will show four strong reflections and one weak. The weak reflections can be hard to see.

I suspect, could be mistaken, that your "11" is an engraving error.

I also suspect that your lens' cells have been remounted in a newer barrel. Your barrel is the new type that was introduced with the plasmat type G-Clarons. But I could be mistaken about when the new type barrel came in.

Well, you are right about it being a dagor type. Two strong and two week reflections.
I also have a 150/9 plasmat type with 35.5 filter threads, and the difference in reflections are obvious.

Not sure about "11" being an engraving error though. It's about half a stop slower than the 150/9 plasmat I have. Measured from the entrance.
And there are no filter threads at all.

Here are both



It's not important of course. I just was a bit curious.
Probably to dim to focus probably, but size and weight are very small.
So far no time to test it on the camera, but i'll take it for a test run soon.

[ic-racer]

About a year ago someone posted questions about one like that. I figured he was using it as an enlarger lens, since it was in a barrel, but he never replied back as to how it worked.

https://www.largeformatphotography.i...=1#post1490502