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 of binoculars 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.
Mother of pearl opera glasses and leather case.Opera glasses with handle, ca.1910
In addition to the more stereotypical binocular type, folding opera glasses were another common design. They were made mostly of metal and glass, with a leatherette cover for grip and color. Although folding glasses have existed in one form or another since the 1890s,[2] they were perhaps most popular in the mid-20th century and many from this era are marked "Made in Japan" or, less commonly, "Made in Occupied Japan". The design can still be purchased new, although the most common contemporary designs are now almost entirely plastic.
opera, glasses, also, known, theater, binoculars, galilean, binoculars, compact, power, optical, magnification, devices, usually, used, performance, events, whose, name, derived, from, traditional, binoculars, opera, performances, magnification, power, below, . 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 of binoculars 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 Mother of pearl opera glasses and leather case Opera glasses with handle ca 1910 In addition to the more stereotypical binocular type folding opera glasses were another common design They were made mostly of metal and glass with a leatherette cover for grip and color Although folding glasses have existed in one form or another since the 1890s 2 they were perhaps most popular in the mid 20th century and many from this era are marked Made in Japan or less commonly Made in Occupied Japan The design can still be purchased new although the most common contemporary designs are now almost entirely plastic See also editLondon Opera Glass Company Monocular Spotting scope Opera Opera hat Opera cloak Opera glovesReferences edit How to Choose Opera Glasses Archived from the original on 8 May 2016 Retrieved 24 April 2016 Pocoscope folding opera glasses External links edit nbsp 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 nbsp This article about an opera or opera related subject is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Opera glasses amp oldid 1189147692, wikipedia, wiki, book, books, library,
