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2. Bell & Howell - Wikipedia

   en.wikipedia.org/wiki/Bell_&_Howell

   In 2010 consumer electronics manufacturer Elite Brands licensed the Bell + Howell brand name to use on optical and imaging products including digital cameras and camcorders, binoculars, telescopes, lenses, and various camera accessories. [16]

3. Field of view - Wikipedia

   en.wikipedia.org/wiki/Field_of_view

   Angular field of view is typically specified in degrees, while linear field of view is a ratio of lengths. For example, binoculars with a 5.8 degree (angular) field of view might be advertised as having a (linear) field of view of 102 mm per meter. As long as the FOV is less than about 10 degrees or so, the following approximation formulas ...

4. Swarovski - Wikipedia

   en.wikipedia.org/wiki/Swarovski

   Swarovski (/ s w ɒ ˈ r ɒ f s k i /, German: [svaˈrɔfski] ⓘ) is an Austrian producer of glass based in Wattens in the Tyrol.It was founded in 1895 by Daniel Swarovski.. The company is split into three major industry areas: the Swarovski Crystal Business, which primarily produces crystal glass, jewelry, rhinestone, watches and accessories; Swarovski Optik, which produces optical ...

5. Pentax cameras - Wikipedia

   en.wikipedia.org/wiki/Pentax_cameras

   This article discusses the cameras – mainly 35 mm SLRs – manufactured by Pentax (ペンタックス, Pentakkusu) Ricoh Imaging Corp. and its predecessors, Pentax Corporation (ペンタックス株式会社, Pentakkusu Kabushiki-gaisha) and Asahi Optical Co., Ltd. (旭光学工業株式会社, Asahi Kōgaku Kōgyō Kabushiki-gaisha).

6. Minox - Wikipedia

   en.wikipedia.org/wiki/Minox

   Minox (pronounced / ˈ m iː n ɒ k s / MEE-noks) is a manufacturer of cameras, known especially for its subminiature camera.. The first product to carry the Minox name was a subminiature camera, conceived in 1922, and finally produced in 1936, by Baltic German Walter Zapp. [1]

7. Microscopy - Wikipedia

   en.wikipedia.org/wiki/Microscopy

   Antonie van Leeuwenhoek (1632–1723). The field of microscopy (optical microscopy) dates back to at least the 17th-century.Earlier microscopes, single lens magnifying glasses with limited magnification, date at least as far back as the wide spread use of lenses in eyeglasses in the 13th century [2] but more advanced compound microscopes first appeared in Europe around 1620 [3] [4] The ...