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The Miranda Camera Company (ミランダカメラ㈱) , originally named the Orion Camera K.K. (オリオンカメラ㈱) in 1955 and Orion Seiki Sangyō Y.K. (オリオン精機産業有限会社) in 1947, manufactured cameras in Japan between 1955 (70 years ago) () and 1976 (49 years ago) (). Their first camera was the Miranda T.
In total, the company estate covered 55 acres (22 ha), had 750,000 square feet (70,000 m 2) of floor space, employed 7,500 men and women (in about equal numbers), and produced $220 million ($3,677 million in 2025) worth of radar systems and optical instruments. [20] They were the largest single employer to ever operate in the Leaside area. [21]
A set of 7×50 binoculars has an exit pupil just over 7.14 mm, which corresponds to the average pupil size of a youthful dark-adapted human eye in circumstances with no extraneous light. The emergent light at the eyepiece then fills the eye's pupil, meaning no loss of brightness at night due to using such binoculars (assuming perfect transmission).
[14] [15] In 1897 Moritz Hensoldt began marketing pentaprism based roof prism binoculars. [16] Most roof prism binoculars use either the Schmidt–Pechan prism (invented in 1899) or the Abbe–Koenig prism (named after Ernst Karl Abbe and Albert König and patented by Carl Zeiss in 1905) designs to erect the image and fold the optical path ...
The aperture range of a 50 mm Minolta lens, f /1.4 – f /16. Lenses with apertures opening f /2.8 or wider are referred to as "fast" lenses, although the specific point has changed over time (for example, in the early 20th century aperture openings wider than f /6 were considered fast. [9]
In practice it is considered to be 2× the aperture in millimetres or 50× the aperture in inches; so, a 60 mm diameter telescope has a maximum usable magnification of 120×. [ citation needed ] With an optical microscope having a high numerical aperture and using oil immersion , the best possible resolution is 200 nm corresponding to a ...