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Distagon 25/1,4 and a Distagon 18/2,8
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PostPosted: Sat Jan 17, 2015 4:36 pm    Post subject: Reply with quote

Bumping this great thread for anyone who missed it first time out.


PostPosted: Sat Jan 17, 2015 5:04 pm    Post subject: Reply with quote

cyrano wrote:
Bumping this great thread for anyone who missed it first time out.


My deep thanks to You for reposting, I didn't know it yet.
And it's worth reading each word & link, THX to You all!


PostPosted: Sat Jan 17, 2015 6:47 pm    Post subject: Reply with quote



BJP 1 February 1980


Last edited by Gerald on Sat Jan 17, 2015 7:25 pm; edited 1 time in total


PostPosted: Sat Jan 17, 2015 6:52 pm    Post subject: Reply with quote

Absolutely mad designs Gerald, where did you find those?


PostPosted: Sat Jan 17, 2015 6:59 pm    Post subject: Reply with quote

cyrano wrote:
Absolutely mad designs Gerald, where did you find those?

"New Developments and Trends in Photographic Optics at Zeiss" by Walter Woltche, Head of Mathematics Department, Photo Optics Division, Carl Zeiss Oberkochen - British Journal of Photography Feb. 1 1980


Last edited by Gerald on Sat Jan 17, 2015 7:26 pm; edited 1 time in total


PostPosted: Sat Jan 17, 2015 7:18 pm    Post subject: Reply with quote

The 35mm f1.4 elements and grouping is different in this schematic:
http://www.zeissimages.com/mtf/cy/Distagon1.4_35mm_e.pdf
It may be me though.....Sad

and this one:
http://www.zeiss.com/camera-lenses/en_de/camera_lenses/slr-lenses/distagont1435.html


PostPosted: Sat Jan 17, 2015 7:41 pm    Post subject: Reply with quote

All Distagons in the Woltche article use aspherical elements. Maybe they were prototypes considered unfeasible for commercial production, or were cine lenses for 35mm format, I don't know.

EDIT: I see now that Zeiss had a cine 18mm F1.2 lens. You can buy one from eBay:
http://www.ebay.com/itm/Zeiss-Arriflex-Distagon-18mm-f-1-2-T-Super-Speed-PL-Lens-For-cine-movie-Camera-/121538168881

And this lens set could be interesting for those that love fast Zeiss lenses: Very Happy

Carl Zeiss 16mm F/2 - Front and rear glass excellent condition.
Carl Zeiss MK III 25mm F/1.2 - Front and rear glass mint condition.
Carl Zeiss MK III 35mm F/1.2 - Front and rear glass mint condition.
Carl Zeiss MK III 50mm F/1.2 - Front and rear glass mint condition.
Carl Zeiss 85mm F/1.2 - Front glass excellent condition, Rear glass has tiny cleaning scratch.


http://www.ebay.com/itm/Excellent-Condition-Arri-Arriflex-Zeiss-Prime-35mm-cine-5-Lens-MIX-set-/261693964590?pt=Camera_Lenses&hash=item3cee2d012e


PostPosted: Sat Jan 17, 2015 10:03 pm    Post subject: Reply with quote

but these lenses only cover s35 (aps-c)


PostPosted: Mon Nov 06, 2017 10:52 pm    Post subject: Reply with quote

What happened to the 25mm 1.4? He have never seen samples and the guy who had them vanished right? Any news to what happened to him?


PostPosted: Tue Nov 07, 2017 1:50 pm    Post subject: Reply with quote

Many thanks for bumping up this fantastic thread. Like 1 Thank you!


PostPosted: Fri Nov 10, 2017 6:42 pm    Post subject: Reply with quote

The corresponding 1977 Zeiss patent (Fischer / Glatzel / Jahn / Zajadatz) lists twenty different examples for fast wideangles, among them some with 78° angle and a speed of f1.25, and others with up to 50° angle and f1.03.

Stephan


PostPosted: Sat Nov 11, 2017 7:57 pm    Post subject: Reply with quote

Really mindblowing thread Like 1 small


PostPosted: Sat Nov 03, 2018 2:43 am    Post subject: Reply with quote

the amazing thing is, Dr. Glatzel was the former boss of my current boss, who also headed the Zeiss optical design department for many years...
this world is so small.


PostPosted: Sat Nov 03, 2018 1:40 pm    Post subject: Reply with quote

Yes, thanks for bumping this - what an amazing find and story! I too am curious if any sample photos were ever posted (anywhere) for us to look at. Anyone have more info on this?


PostPosted: Sun Jun 14, 2020 11:46 pm    Post subject: Reply with quote

Not sure why this all of a sudden pop again, but well, those are inpressive prototype lenses indeed...

https://petapixel.com/2013/01/25/grandson-of-zeiss-lens-designer-was-left-a-holy-grail-of-zeiss-lenses/


Last edited by kds315* on Mon Jun 15, 2020 3:45 pm; edited 1 time in total


PostPosted: Mon Jun 15, 2020 12:28 pm    Post subject: Reply with quote

kds315* wrote:
Not sure why this all of a sudden pop again, but well, those are inpressive prototype lenses indeed...


An improved version of the CY Distagon 1.4/25 is available now ... the Milvus 1.4/25 shares the same construction principles with its ancestor from 1976 (here the lens section of a 1.3/35mm prototype is shown; sadly I didn't find the lens section of the CY Distagon which was available on the Zeiss webpage some years ago):



The above lens basically consists of a Gauss design master lens (right part "O") and a Newton Finder (left part, "NS" = "Newtonsucher" in German). The Newton itself consist of a negative front part ("NN") and a postive lens ("NO"), as you can see from the simplified diagram of a Newton Finder (image from https://www.spektrum.de/lexikon/optik/sucher/3305):



The fairly recent Zeiss Milvus 1.4/25mm uses exactly the same principles. Its construction certainly is based upon the Glatzel patent from 1976!


Stephan


PostPosted: Mon Jan 10, 2022 9:31 pm    Post subject: Reply with quote

Hello everybody,
I stumbled upon this topic when looking for information on Zeiss prototype lenses.
Wow, that 25 and 18 look absolutely terrific!

On a side note, I wonder if any of you have found other prototype versions in the market and if it's actually worth it to buy them (since I'm not sure if their performance is on par with the commercially released copies).
I say this because I recently found a Zeiss Distagon 28 f2 for Contax Yashica mount but that says "HFT" on the front. It also has a serial number of 25XXXXX which seems to be about right for prototypes.
Maybe it's a prototype version for taking the lens design from Rollei QBM to C/Y?

If any one has any thoughts, I'd love to hear them.
Regards


PostPosted: Wed Jun 08, 2022 10:01 pm    Post subject: Reply with quote



PostPosted: Wed Jun 08, 2022 10:02 pm    Post subject: Reply with quote

Unfortunately missing part of it


PostPosted: Wed Jun 08, 2022 10:53 pm    Post subject: Reply with quote

Very nice, where did you find this? Any more pictures you could share of it for posterity?


PostPosted: Thu Jun 09, 2022 7:54 am    Post subject: Reply with quote



PostPosted: Thu Jun 09, 2022 7:56 am    Post subject: Reply with quote

I took a screen shot from the web, could it be possible 18mm 1.2 ?

Last edited by kiddo on Thu Jun 09, 2022 10:21 am; edited 3 times in total


PostPosted: Thu Jun 09, 2022 8:19 am    Post subject: Reply with quote

I haven't seen a complete sample before ,neither pictures taken with it


PostPosted: Thu Jun 09, 2022 5:30 pm    Post subject: Reply with quote

kiddo wrote:
I took a screen shot from the web, could it be possible 18mm 1.2 ?

It seems so. Might be the 1.2/18mm Super Speed Distagon for the Arriflex.

S


PostPosted: Fri Jun 10, 2022 12:36 pm    Post subject: Reply with quote

https://thecinelens.com/2016/08/24/whats-in-a-name-a-guide-to-zeiss-super-speeds/
It looks like mk1 expanded scale , but it's not 100% the same