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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
The history of the single-lens reflex camera (SLR) begins with the use of a reflex mirror in a camera obscura described in 1676, but it took a long time for the design to succeed for photographic cameras. The first patent was granted in 1861, and the first cameras were produced in 1884, but while elegantly simple in concept, they were very ...
The Italian Rectaflex offered its first production SLR, the series 1000, the same year. A single-lens reflex camera ( SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured.
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Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
The first widely-available fisheye lens for 35mm cameras was the Fisheye-Nikkor 8 mm f /8 from Nikon, released in 1962, which produced circular images similar to those popularized by the LIFE photographers; that lens served as the "eye" of the HAL 9000 computer from the film 2001: A Space Odyssey, although scenes depicting HAL's point of view ...
The camera has been in and out of development since 2003 and went on sale in Japan in May 2010 at RRP of ¥850,000, with supplies to the rest of the world expected to start soon after. It is targeted at professionals doing outdoor photography—camera body features very high level of airtightness. It uses a 40 megapixels, 44 mm × 33 mm CCD ...
unstabilised. lens-based optical stabilisation. sensor-shift optical stabilisation. digital or electronic stabilisation. Image stabilization ( IS) is a family of techniques that reduce blurring associated with the motion of a camera or other imaging device during exposure . Generally, it compensates for pan and tilt (angular movement ...
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3579 S High St, Columbus, OH · Directions · (614) 409-0683