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Leitz Dimatar 20cm f/2.3 Projector Lens info?


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Hello

 

Does anyone have info on this lens? It's a projector lens that came with Leitz Prado slide projector. But i have never seen another one. I can't find anything about Dimatar. Dimaron is a common lower end lens i know that, but Dimatar? It's also f2.3, even faster than the f2.5 Hektors.

Edited by dimatar
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Hello

 

... But i have never seen another one. ...

Do you mean you DID see a projektor Leitz lens named Dimatar, 200mm 2,3 ? I have many old catalogs, very detailed also on projektors... but never saw such a lens, though many 200mm were listed in the years (Dimar, Dimaron, Hektor, Elmaron... and there was even an accessory to use the 200mm Leitz Telyt...)

Maybe (just guessing) wasn't made for the "normal" projektors product line, but for some special kit... listed not in the photographic catalogs but in the specialized pricelists (microscopy, surveying....)

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Do you mean you DID see a projektor Leitz lens named Dimatar, 200mm 2,3 ? I have many old catalogs, very detailed also on projektors... but never saw such a lens, though many 200mm were listed in the years (Dimar, Dimaron, Hektor, Elmaron... and there was even an accessory to use the 200mm Leitz Telyt...)

Maybe (just guessing) wasn't made for the "normal" projektors product line, but for some special kit... listed not in the photographic catalogs but in the specialized pricelists (microscopy, surveying....)

Hello

 

I bought one. It came with Prado 500 series projector. I was going to adapt it to 4x5 use, but i'm started thinking that if its some sort of unique collectors item i would not want to destroy such a thing.

 

It's the same size as 200/2.5 Hektors and uses the same tube. Looks a bit different.

 

It's still in the mail, but when it arrives i can post some pictures of it. Also can give info on the construction, though i assume its a triplet (as Dimarons). Even though f2.3 is really pushing it when it comes to triplets... so it might be something else (hopefully:)  also.

Edited by dimatar
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... I wonder if it could be related to those "next to projektors" items named epidiascopes....(for which, indeed, lenses were usually baptized "EPIS")...  Leitz used to have a complete product line of, but I have never seen a complete catalog ... they probably were mainly targeted at Universities and similar institutions so that there were not the usual "dealers' list".  If I remember correctly, I read of a lens named "Dimenar" (but not "Dimatar") into one of those Epidiascopes...

Edited by luigi bertolotti
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Www.pradomuseum.eu is a Virtual Museum of Leitz Projektors with a lot of photos. i was not able to find there any reference to Dimatar, you may try to drop them a mail

 

I can´t seem to be able to reach that address. I will try again later, maybe it´s just currently down or something.

 

Ok, found it.. it was http://www.pradoseum.eu/

 

This was just the type of info i was looking for, someone who specialises in this stuff. I sent him a email, lets see if he has some info.

Edited by dimatar
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... I wonder if it could be related to those "next to projektors" items named epidiascopes....(for which, indeed, lenses were usually baptized "EPIS")...  Leitz used to have a complete product line of, but I have never seen a complete catalog ... they probably were mainly targeted at Universities and similar institutions so that there were not the usual "dealers' list".  If I remember correctly, I read of a lens named "Dimenar" (but not "Dimatar") into one of those Epidiascopes...

I remembered correctly...

 

 

Aperture not reported... but for reasons of "naming affinity" (and "focal affinity") I would search into that direction... but as I said I'm poor about Epidiaskopes' docs...

Edited by luigi bertolotti
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I remembered correctly...

 

DIMENAR_epidiaskop_1950.jpg

 

Aperture not reported... but for reasons of "naming affinity" (and "focal affinity") I would search into that direction... but as I said I'm poor about Epidiaskopes' docs...

 

 

I think there is not much need for large aperture lenses in diascopy. f2.3 definitely means projector or something where large aperture like that would be beneficial. Also as the mount is same that i used on Prado projectors, i'm inclined to think its made for projectors. Episcopes have a different type of lens mount, though i think episcope lenses are less quality cirital.. and if its' f2.3 triplet.. it cant be that sharp.

 

The pardomuseum person sadly did not reply, so maybe this lens will remain a mystery...

Edited by dimatar
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Well, i got the lens today. It´s larger than a Hektor 200/2.5. And its not a triplet, seems to be 4 or 5 elements. So i assume this is pretty high quality lens.

 

My questimation, that this is a Sonnar design. Or something similiar.

 

 

 

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I think the Ultrastigmat design is pretty spot on, as Sonnar has two elements in the rear. And this Dimatar lens only has single element. I'm still unsure is the middle fat element doublet or just one lens.

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Thanks for the picture of this "mystery" Dimatar...  the barrel is indeed quite similar to Hektor Projektion lenses of similar specs (herunder, the 250 2,8)

 

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Yes, the barrel is pretty much identical. I have 150,175,200,250 and 300 Hektors. Also the lens cap is the same style as Hektors usually come with. And it did also have the focus barrell, same color & paint & mount than all the Prado tubes.

 

 

It might be slightly telefocus, this is Ernostar 100/2. I think this is the basis for Sonnar design, and i think Sonnar is always at least slightly telefocus.

 

Well, at least i'm happy as it was not just another Triplet. But something more interesting that i have not had before. Shame nobody knows anything about this lens.

 

As I need to chop the barrel to use it on 4x5", i'm hoping it's not some sort of collectors holy grail.

 

The only thing that makes me suspicious of its origin, is that the tube has an adapter. it's hard to say is this factory made or not? Anyhow, it does have a larger thread on the tube, and an adapter that steps it down to Prado size.

 

Original thread size is about 64.8mm

Edited by dimatar
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Well, you really have triggered my Leitz / Philology frenzy with this lens...

 

 

(btw... I also saw on ebay a Hektor 150 for Prado treated as you plan... chopped and mounted on a sort of Linhof or Graflex plate for usage on 4"x5"... Always and only  wide open, it seems...I'd be curios to see the results... maybe a "Thambar-like" effect...)

Edited by luigi bertolotti
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