Prime Lens: Either a photographic lens whose focal length is fixed, as opposed to a zoom lens, or it is the primary lens in a combination lens system.
Wide-Angle Lens: lens whose focal length is substantially smaller than the focal length of a normal lens for a given film plane; used in architectural, interior and landscape photography where the photographer may not be able to move farther from the scene to photograph it
Calypso Underwater Camera: Conceived by the marine explorer Jacques-Yves Cousteau, camera operates down to 200 feet / 60 meter below sea level; composed of two black enamelled cast alloy body parts
Through-the-lens metering: photographic term describing a feature of cameras capable of measuring light levels in a scene through their taking lenses, as opposed to a separate metering window; used to select a proper exposure and control the amount of light emitted by a flash connected to the camera
Wide-Angle Lens: lens whose focal length is substantially smaller than the focal length of a normal lens for a given film plane; used in architectural, interior and landscape photography where the photographer may not be able to move farther from the scene to photograph it
Calypso Underwater Camera: Conceived by the marine explorer Jacques-Yves Cousteau, camera operates down to 200 feet / 60 meter below sea level; composed of two black enamelled cast alloy body parts
Through-the-lens metering: photographic term describing a feature of cameras capable of measuring light levels in a scene through their taking lenses, as opposed to a separate metering window; used to select a proper exposure and control the amount of light emitted by a flash connected to the camera
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