Opera glasses
Mother of pearl opera glasses and leather case.
Opera glasses, also known as theater binoculars or Galilean binoculars, are compact, low-power optical magnification devices, usually used at performance events, whose name is derived from traditional use at opera performances. Magnification power below 5× is usually desired in these circumstances in order to minimize image shake and maintain a large enough field of view.[1] A magnification of 3× is normally recommended. The design of many modern opera glasses of the ornamental variety is based on the popular lorgnettes of the 19th century.
The London Opera Glass Company was founded in 1913 and provides opera glasses in many of London's West End theatres.[2][3]
See also
References
- ↑ "How to Choose Opera Glasses". Retrieved 24 April 2016.
- ↑ "Two famous London theatres get Opera Glasses in time for new productions". Theatre Views Newsletter. Summer 2009. Retrieved May 9, 2012.
- ↑ "1.8 million views of Lion King". Theatre Views Newsletter. October 2011. Retrieved May 9, 2012.
External links
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Wikimedia Commons has media related to Opera glasses. |
- Chambers's Encyclopaedia: A Dictionary of Universal Knowledge, Volume 7
- The Opticalia Museum Opera Glasses
- The Encyclopedia Americana, Volume 11
- The History of Opera Glasses
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