eric_beltrando Posted October 16, 2006 Share Posted October 16, 2006 Hello, Sorry for my poor english, I am french !I am not a vendor, nor a professional. Just somebody who likes lenses !I have a collection of lenses formulas, and i have written a program to simulateles images they supposed to give. But I have much difficulties to know what lensdesign have in the commercial reality. I know some of them, like Protar, PlanarCelor or others great celebrity, but I have a lot of unknown. Can you help me ? Here the adress of my home-page http://dioptrique.info/ Thank you and with hope for a response ! Link to comment Share on other sites More sharing options...
dan_fromm2 Posted October 16, 2006 Share Posted October 16, 2006 Hmm. Are you acquainted with the work of Brian Caldwell? He has a commercial lens design program whose database contains more than 10,000 designs, mainly taken from patent descriptions. Are you acquainted with Emmanuel Bigler? You can find him through http://www.galerie-photo.info/forum/ . Do you know A Lens Collector's Vade Mecum, H. M. Linde's book The Photographic Lens (originally in German), A. Cox' book Photographic Optics, S. F. Ray's Applied Optical Design, ... Many of the lenses whose cross sections are published on your interesting site are named in those books. I've seen assertions that Boyer redesigned the tessar type Saphir (there are also 6/4 double Gauss type Saphirs, 6/4 plasmat type Saphir Saphir BX, heliar type Apo Saphirs, ... ) at the same time they began coating their lenses. This would have been in 1947-8. I see that your 1935 and 1947 f/4.5 Saphirs have very similar curves. Did you take the 1947 design from a coated lens? Amicalement, Dan Link to comment Share on other sites More sharing options...
winfried_buechsenschuetz1 Posted October 17, 2006 Share Posted October 17, 2006 Pour savoir plus de la construction des objectifs photographiques il ya un livre francais ancien formidable: "L'objectif photographique". Il donne des dessins des tas des objectifs et des descriptions courtes meme plus nombreuses. Il y a aussi un bouquin allemand, "Das Auge meiner Kamera" (l'oeil de mon appareil). Il y a des editions jusqu'au 1960 env., donnant une description des objectifs allemands de cette epoque. Link to comment Share on other sites More sharing options...
stephen_w. Posted October 17, 2006 Share Posted October 17, 2006 Could you please respond in English? It seems Eric's English is better than I hear around Rice University (Elite?), and you could benefit more PN members. If you're not showing off, why not e-mail Eric privately? Link to comment Share on other sites More sharing options...
dave_s Posted October 18, 2006 Share Posted October 18, 2006 You said it, Stephen. Shucks, I mean, if English was good enough for Jesus Christ, I figger it's good enough for me. Link to comment Share on other sites More sharing options...
h._p. Posted October 18, 2006 Share Posted October 18, 2006 It's always nice to see someone showing off. After all, think of all the wars we'd have missed if everyone spoke the same language. Link to comment Share on other sites More sharing options...
winfried_buechsenschuetz1 Posted October 18, 2006 Share Posted October 18, 2006 OK, I just wanted to point the OP towards the french book "L'objectif photographique" (Photographic lenses) which shows cross-sections of many lenses and describes even more. There was a similar book in german, "Das Auge deiner Kamera" (Your camera's eye) showing cross-sections and performance diagrams of many - mostly german - lenses. I think the last edition was released in the early 60s. Link to comment Share on other sites More sharing options...
bacsa Posted October 19, 2006 Share Posted October 19, 2006 :) if someone can speak a second langue, that's already "showing off"? Funny. Anyway, Sydney F. Ray has some more recent books about lenses and other things in photography. They are very well written with lots of images and drawings. Link to comment Share on other sites More sharing options...
MTC Photography Posted October 19, 2006 Share Posted October 19, 2006 I recommend Rudolf Kingslake's book" "History of Photographic Lenses" Link to comment Share on other sites More sharing options...
rachel_sekely Posted October 28, 2006 Share Posted October 28, 2006 this guy knows all the lenses, it seems. http://rick_oleson.tripod.com/index-99.html Link to comment Share on other sites More sharing options...
michael_michaelski Posted November 4, 2006 Share Posted November 4, 2006 There is also a book called "Photo Technology Data Book". I think I got mine from Craig Camera. There are over 188 different lens cross sections and an extensive listing of manufacturers and model designations - and it's all 'old' stuff (pre 1970's). And that section does not have many words that need translating, and thus useful to all, no matter what their native language. Mike Link to comment Share on other sites More sharing options...
eric_beltrando Posted November 10, 2006 Author Share Posted November 10, 2006 Bonsoir à vous tous, Well, i'll try to answer in English. Prime, thank you for your reactivity and all your advices. Next, For Dan, No, I am not acquainted with the work of Brian Caldwell (I discover his name in this Forum, sorry for my ignorance), nor with Emmanuel Bigler, (I know his Forum, but I think mostly oriented to images). No, I am simply an alone autodidact calculator, no more ! Dan, I don't know those two books. They seem to be untraceable in France. Nevertheless I'll try to find them, but if somebody knows where to buy them, it would be very useful for me ! I don't dismount my lenses to measure them : I am not rich enough ! No, I find a lot of patents on specialised sites, and I have a great collection of lenses plans' copies of Boyer, because I knew very well the president-owner of the firm, and worked with hi for a while. Are you Dan to whom I write for a some days on may mail ? Winfried, je possède le livre d'Andreani qui m'aide énormément. Mais Andreani ne donne pas d'antériorités, et ne cite pas les sources de ses coupes, toutes exactes, ce qui est extraordinaire ! Pour votre livre en allemand, je ne suis malheureusement pas germanophone, et à moins qu'il ne contienne beaucoup d'images ou de nombres explicites, je risque de ne pas pouvoir m'en servir. Ceci étant, savez-vous où il serait possible d'en consulter un ? Ne serait-ce que pour savoir s'il peut m'être utile ? Il y a aussi un livre de Merte, introuvable (ou hors de prix), que je cherche désespérément à un prix abordable, et la liste de toutes les formules de Zeiss, publiée à prix d'or par les américains après la guerre. Sans compter LensView, dont le coût le réserve à Rosthchild... Stephen, sorry for my a parte with Winfried. I continue in my bad gibberish (pleonasm)... I answer that I have the french book he is speaking about. I say him that I don't understand the most little word of german (even if I direct sometimes cantatas of Bach : don't betray me, I have a translation under the music :-) So I am afraid his german book would not be very useful for me. I know also the electronic base LensView, but it is horribly expensive. And the others classical books about lens design are not accessible out of specialised and remote libraries... Csab'józsa, what are those books ? Can you send me some precisions ? Rachel, I have been on his site, but if he can manifestly repair virtually any thing taking a snapshot, I am not sure he can identify a lens just knowing its RND constants. But I will send him a mail some day, why not ? He seems to be very kind on his self-portrait, and I am also a collector of slide rules, I used for years in my studious youth. Mike, that's exactly what I want ! Where can I find it, knowing I am living in deep french countryside ? And I am unfortunately not Cresus' nephew ? Thank you all, for the time you spent for me, and see you soon perhaps at http://dioptrique.info, if you understand some words of Molière's language ! Amitiés Eric: PS: Somebody asked me on my mail to make an optical French-English lexicon to help everybody ( et peut-être même les français ! ;-) access to my work. Is there any body able to help me (in French, please !) in this attempt ? Link to comment Share on other sites More sharing options...
dan_fromm2 Posted November 10, 2006 Share Posted November 10, 2006 Eric, je vous enverrai un e-mail plus tard. Amicalement, Dan Link to comment Share on other sites More sharing options...
eric_beltrando Posted November 11, 2006 Author Share Posted November 11, 2006 Sorry Martin, I forgot to say you I have had Kinglake's book last Chrismas ! Sincerely, Eric <Dad, you don't "direct cantatas of Bach", youn "cunduct" them !> Pauline B. Link to comment Share on other sites More sharing options...
dan_fromm2 Posted November 11, 2006 Share Posted November 11, 2006 Eric, dite a votre fille Pauline q'en Anglais "One conducts an orchestra" mais en francais "on dirige un orchestre." Dirigir-direct, c'est plus ou moins un cognat faux. Link to comment Share on other sites More sharing options...
eric_beltrando Posted November 11, 2006 Author Share Posted November 11, 2006 Bonsoir Daniel, Nous allons nous faire gronder par le Webmaster ! J'ai transmis, and "she is very proud to have had an answer on such a forum by such a contributor" ! On an other way, I have find Mrs Uli Mayer, who seems to have this really unfoundable book of Willy Merté deliciously called :Handbuch der wissenschaftlichen und angewandten Photographiein german in the text...Do you if it would be possible to ask her where and how dshe has found this Optical Lens Designe Bible. Thank you, and soon by mail. Eric Link to comment Share on other sites More sharing options...
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