Text Box:   VINTAGE MINIATURE BINOCULARS

Japanese External Reverse Porro Prism Binoculars. VIRTUAL MUSEUM

Les origines de l'Allemand jumelles miniatures

Истоки немецкий миниатюрный бинокль

Los orígenes del alemán prismáticos en miniatura

ドイツのミニチュアの双眼鏡の起源

 MINIATURFERNGLÄSSER: DEUTSCHE URSPRÜNGE Nr 3

MARK OHNO

Text Box: Additional Advertisements: Fata Morgana Binoculars Weitere Werbematerialien für „Fata Morgana“-Ferngläser. Annonces Supplémentaires: «Fata Morgana» Jumelles. Дополнительные рекламные объявления: «Fata Morgana» бинокль.   追加のアドバタイズメント:Fata Morgana双眼鏡.Ytterligare annonser: “Fata Morgana” kikare. Nuevos anuncios: «Fata Morgana» Prismáticos.

Fata Morgana advertisement by the optician ETZ & PRITCHARD in Charleston, West Virginia USA, June 1923

Fata Morgana advertisement by the jewelers William Wise & Son, Flatbush Ave at  Fulton & Nevins Streets, Brooklyn NY USA in 1922

Using Fata Morgana binoculars. „Fata Morgana“ Ferngläser im Gebrauch.

Jumelles «Fata Morgana» en cours d’utilization.

Optical Journal and Review of Optometry  Vol 49 Jan 1922

Text Box:   Precedent Design? Präzedenzfall -Design? Précédent design? Прецедент Дизайн? 先例のデザイン
   Prejudikat Design? Diseńo Prejudikat?

    An interesting pair of prismatic binoculars (or binocular telescope) exists in the Louwman Collection of Historic Telescopes in the Netherlands. They were created by Carston Diederick Ahrens (1837-1918), ...“the most famous maker of hand ground precision optical glass, polarizing Nicol prisms and quartz plates in the world during his lifetime” according to Stuart Talbot. Ahrens worked in and around London, England. The binoculars are of interest in the context of this website because the prism arrangement and physical presentation (though not the size or objective tubes) is similar to the design later used by Baumann in the Fata Morgana. Ahrens was issued a British patent number of 17102/84 on Dec 31, 1884. No patent details survive, and there is contemporary evidence the patent was not completed (exhibited, but not registered plus completed). Stuart Talbot notes that in “Binokularen Instrumenten” published by Carl Zeiss Jena historian Prof. Moritz von Rohr in 1920, Rohr states that Carston Ahrens applied for an  English patent for a double telescope in 1884, but the patent was not completed. Rohr stated that the firm of Carl Zeiss was in possession of an example of the Ahrens binoculars, but that Ahrens had not utilized the advantage of image erection by Porro prisms to result in shortened [objective] tubes.

   Zeiss subsequently did so with their 1894 compact binoculars, and then Baumann took miniaturization quite a further with his 1919 design.

 

 

 

Ahrens Photos courtesy of Peter Louwman

Louwman Collection of  Historic Telescopes, The Netherlands

It is amusing to note that the United Binocular Co of Chicago imported a reverse poro prism design that seems to be quite similar to the 1884 Ahrens binoculars, which they called “the Falcon”, for a short time around 1956. That design did not seem to persist, and was presumably not so popular. I have not yet obtained an example. They also sold monocular spotting scopes of a similar design, which seemed to be more popular, and seem to have been produced in larger quantities.

The following information is based on information from the article “C.D. Ahrens (1837-1918) Optical Prism Worker of Every Description” by Stuart Talbot, FRAS, published in The Bulletin of the Scientific  Instrument Society No 121 (2014), and provided to me by Peter Louwman. Additional information is from a history of C. D. Ahrens by Jean and Colin Gaskin which can be viewed at Peter Abrahams website at: http://home.europa.com/~telscope/temp/Gaskin.2011.C.D.Ahrens.pdf.

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Do you own one of these miniature binoculars? Send me a photo of someone looking though them and I may post it on this website. Send by email to

miniature.binoculars@gmail.com.

 

Haben Sie eines dieser Miniaturfernglasbesitzen ? Schicken Sie mir ein Foto von jemanden, wenn sie, und ich kann es auf dieser Website veröffentlichen . Per E-Mail an miniature.binoculars@gmail.com

 

Possédez-vous un de ces jumelles miniatures ? Envoyez-moi une photo de quelqu'un qui cherche si eux et je peux publier sur ce site . Envoyer par email ŕ miniature.binoculars@gmail.com

 

あなたはこれらのミニチュア双眼鏡の1を所有していますか?私にそれらかかわら探し誰かの写真を送信し、私はこのウェブサイト上でそれを掲示することがありますminiature.binoculars@gmail.comに電子メールで送信します

 

Possiedi uno di questi binocoli miniatura ? Inviami una foto di qualcuno in cerca anche loro e posso postare su questo sito . Invia per e-mail a

miniature.binoculars@gmail.com

 

Vill du äger en av dessa miniatyr kikare ? Skicka mig ett foto av nĺgon ser även dem och jag kan lägga upp den pĺ denna webbplats . Skicka med e-post till miniature.binoculars@gmail.com

 

żEs usted el propietario de uno de estos binoculares en miniatura ? Envíame una foto de alguien que busca , aunque ellos y puedo publicarlo en este sitio web. Enviar por correo electrónico a miniature.binoculars@gmail.com

 

Ydych chi'n berchen ar un o'r ysbienddrych bach hyn? Anfon llun o rywun yn edrych arnynt er mi ac efallai y byddaf bostio ar y wefan hon. Anfonwch e-bost at miniature.binoculars@gmail.com