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Vintage Japanese Binoculars

Started by Milt, 02/10/2003 10:48AM
Posted 02/10/2003 10:48AM Opening Post
Hello All,

While researching my late father-in-law's 40yr. old Japanese 7x50's, I came across a couple of websites that may be of interest to this forum. The first one is
http://home.europa.com/~telscope/jbcode.txt
which describes the Japanese Manufacturer's Code for optical products started in 1959. A list is given that allows you to decode the manufacturer based on numbers stamped in the frame. In my case, I found that these 'Tower' binoculars were actually manufactured by Ofuna, who made Japanese military binoculars for WWII.

The second site is
http://home.europa.com/~telscope/JpnSurvy.txt
which keeps track of data from vintage Japanese binoculars, with a form that you can use to add your binos to the anonymous database.

Old Japanese binoculars should not be overlooked for astronomy. These Ofuna's are very well made and still work well. Although only single-coated, they show little color due to the low magnification. At 7.1 degrees (about 80% usable), they provide a wider FOV than anything else I own.

Gotta quit collecting,
Milt