camera with a long-focal-length telephoto lens

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• Focal length — The focal length of an optical system is a measure of how strongly it converges (focuses) or diverges (diffuses) light. A system with a shorter focal length has greater optical power than one with a long focal length. Thin lens approximation For… …   Wikipedia

• Telephoto lens — Tel e*pho to lens n. a special compound camera lens with a long effective focal length but used in a camera with a short focal length, allowing large images to be obtained of distant objects when used in a camera in place of an ordinary lens;… …   The Collaborative International Dictionary of English

• Telephoto lens — Portal|Photography|Large format camera lens.jpg created by a telephoto lens is the same as that created by an ordinary lens of the same specified focal length. Construction If a camera lens were to be constructed from a single lens of 200 mm… …   Wikipedia

• telephoto — (lens)   refers to a camera lens with a very long focal length and narrow angle of view the effect is to compress or condense depth in space, thereby bringing distant objects closer to the viewer (without moving the camera), but it also flattens… …   Glossary of cinematic terms

• telephotographic lens — Telephoto lens Tel e*pho to lens n. a special compound camera lens with a long effective focal length but used in a camera with a short focal length, allowing large images to be obtained of distant objects when used in a camera in place of an… …   The Collaborative International Dictionary of English

• telephoto — TV Camera lens with long focal length and narrow horizontal field of view. Opposite of wide angle, captures magnified, close up images from considerable distance …   Audio and video glossary

• Lens speed — refers to the maximum aperture diameter, or minimum f number, of a photographic lens. A lens with a larger maximum aperture (that is, a smaller minimum f number) is a fast lens because it delivers more light intensity (illuminance) to the focal… …   Wikipedia

• Camera shake — is a common problem in photography when telephoto lenses or long shutter speeds are used with a non stabilized camera. The resulting images will appear blurry and smeared. This is generally seen as an unwanted effect, in contrast to motion blur… …   Wikipedia

• Camera — For other uses, see Camera (disambiguation). Various cameras A camera is a device that records and stores images. These images may be still photographs or moving images such as videos or movies. The term camera comes from the camera obscura… …   Wikipedia

• History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …   Wikipedia

• Zoom lens — Nikkor 28 200 mm zoom lens, extended to 200 mm at left and collapsed to 28 mm focal length at right A zoom lens is a mechanical assembly of lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed… …   Wikipedia