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PostPosted: Sat Sep 19, 2009 9:56 pm    Post subject: Reply with quote
LucisPictor wrote:
Yes, great thread!

amoebahydra wrote:
... Ultron 1:1.8/50 which has an extra-ordinary concave front element.

Did you know that this concave element was a result of a bet? The designer was betting that he was able to design such a lens, he won and actually made one of the best lenses ever calculated.


The bet was actually about the placement of the field flattener and Dr Tronnier claimed that he could place it as a first lens element. Later designers took up his idea, so if you have a look at the Zeiss (Hasselblad) UV Sonnar 4.3/105mm for NASA, you can easily see how his idea has manifested in the heads of lens designers!


PostPosted: Sun Sep 20, 2009 6:04 am    Post subject: Reply with quote
I think Tronnier also designed the Schneider Angulon. Speaking of Pentax, here is mine:


PostPosted: Sun Sep 20, 2009 6:23 am    Post subject: Reply with quote
Just thought i would let you know there is a Super-Farrand 0.87/76mm on eBay at the moment, it looks like it needs a lot of love, but it is very cheap.

http://cgi.ebay.com.au/Large-Super-Farron-Lens-f-87-76mm-Farrand-Lense_W0QQitemZ230378508098QQcmdZViewItemQQptZCamera_Lenses?hash=item35a3a10f42&_trksid=p3286.c0.m14

I assume it would be a fairly collectible lens?


PostPosted: Tue Sep 22, 2009 6:57 pm    Post subject: Reply with quote
kds315* wrote:
LucisPictor wrote:
Yes, great thread!

amoebahydra wrote:
... Ultron 1:1.8/50 which has an extra-ordinary concave front element.

Did you know that this concave element was a result of a bet? The designer was betting that he was able to design such a lens, he won and actually made one of the best lenses ever calculated.


The bet was actually about the placement of the field flattener and Dr Tronnier claimed that he could place it as a first lens element. Later designers took up his idea, so if you have a look at the Zeiss (Hasselblad) UV Sonnar 4.3/105mm for NASA, you can easily see how his idea has manifested in the heads of lens designers!


Not to mention, the "Post-Gaussian" complex designs of some of the newest and sharpest ever Leica lenses!

According to Albrecht Tronnier jr., son of A.W. Tronnier, the design of the 50/1.8 - on my favorite "M42 adapted" camera here -



- was initiated by a talk between Tronnier and his good friend Dr. Back, jewish parentage, emigrated out of Nazi Vienna to the US, designer of many famous lenses incl. the ZOOMAR - which has a FLAT front element... Back asked: Well, every 50mm lens in the world needs to start with a convex front element, right? Tronnier: No. The next lens I calculate will have a concave one!

Believe it or not - but it's an excellent lens even by today's standards!


PostPosted: Tue Jan 19, 2010 11:19 pm    Post subject: Here's a few more of my Pentax m42 bodies . . . Reply with quote
Black "late" SV with my spare Auto-Tak 55mm f1.8 'Zebra'

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Chrome Honeywell version of the ES. Some people think this one was never available in chrome.




H2 Heiland Honeywell version



Group of pre-Spotmatic m42 bodies

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PostPosted: Tue Jan 19, 2010 11:22 pm    Post subject: German m42 . . . Reply with quote
Contax D



Practiflex Fx







PostPosted: Tue Jan 19, 2010 11:24 pm    Post subject: ~1981 ME F & AF 35-70mm f2.8 with ME II winder Reply with quote




PostPosted: Wed Jan 20, 2010 8:17 am    Post subject: Reply with quote
The ME F looks really scary .. Shocked


PostPosted: Wed Jan 20, 2010 8:56 pm    Post subject: Reply with quote
kansalliskala wrote:
The ME F looks really scary .. Shocked


Its actually a small body without the winder and a different lens like a M 50mm f1.4. However, while the lens was something of an experimental AF from 1981, optically its a nice glass especially given its the only 35-70mm f2.8 lens Pentax ever produced. The Me F is very very similar to the Me Super.


PostPosted: Thu Jan 21, 2010 11:05 am    Post subject: Reply with quote
Poolhall wrote:


The design on this Zenit is awful and fantastic at the same time! Thanks for sharing, I never new this camera existed.


PostPosted: Thu Jan 21, 2010 3:21 pm    Post subject: Reply with quote
Esox lucius wrote:
Poolhall wrote:


The design on this Zenit is awful and fantastic at the same time! Thanks for sharing, I never new this camera existed.


Shocked
I'm starting to think that Ronald Reagan was right after all ..


PostPosted: Thu Jan 21, 2010 3:22 pm    Post subject: Reply with quote
kansalliskala wrote:
Esox lucius wrote:
Poolhall wrote:


The design on this Zenit is awful and fantastic at the same time! Thanks for sharing, I never new this camera existed.


Shocked
I'm starting to think that Ronald Reagan was right after all ..


Never seen any! Congrats!


PostPosted: Thu Jan 21, 2010 10:07 pm    Post subject: Reply with quote
Here are mines
Not as fantastic as yours












PostPosted: Mon Jan 25, 2010 3:53 pm    Post subject: olympus om2 Reply with quote
APologies to the purists


Works in the preview but not when I post it? maybe because it is first post?


PostPosted: Mon Jan 25, 2010 4:07 pm    Post subject: Re: olympus om2 Reply with quote
Revolution wrote:
APologies to the purists


Works in the preview but not when I post it? maybe because it is first post?


mmm, nice Wink
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