100 Years of Nikon Binoculars +NIKON 25cm大雙筒

[peter]

100 Years of Nikon Binoculars
Nikon Museum will hold a special exhibition entitled “100 Years of Nikon Binoculars” from July 3 to September 29, 2018.

National Museum of Nature and Science at Ueno, Tokyo
上野 日本國立科學博物館  
 25cm大雙筒  1939年

 25 cm binocular telescope that now belongs to the National Museum of Nature and Science and had the largest diameter of any portable practical telescope in the world, 250x magnification, and a total length of approximately 2 meters, will be exhibited for the first time in 50 years. Approximately 300 binoculars will also be exhibited, including Japan’s first commercial binoculars as well as the latest models and product brochures.

PDF

The history of Nikon binoculars. Updated: 15 Jun 2018 Table of ...
Hans Braakhuis

[peter]

http://redbook-jp.com/kenkyukai-e/2012/201206.html

[peter]

http://redbook-jp.com/kenkyukai-e/2010b/201010.html

[peter]

dob  22"
https://hackaday.com/2008/12/09/22-binocular-telescope/


This is the worlds largest known visual binocular.

不過 LBT才是最大
https://en.wikipedia.org/wiki/Large_Binocular_Telescope


https://www.atlasobscura.com/places/large-binocular-telescope