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 ordinary lens; -- called also {telephotographic lens}. [PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • telephotographic lens — noun : a telephoto lens …   Useful english dictionary

  • telephotographic — adj. of or pertaining to telephotography, of or pertaining to the photography of distant objects using a telephoto lens of electronic image enhancing equipment …   English contemporary dictionary

  • 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 — Photog. a lens constructed so as to produce a relatively large image with a focal length shorter than that required by an ordinary lens producing an image of the same size: used to photograph small or distant objects. Also called telephotographic …   Universalium

  • F-number — In optics, the f number (sometimes called focal ratio, f ratio, or relative aperture [Smith, Warren Modern Lens Design 2005 McGraw Hill] ) of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens; …   Wikipedia

  • telephotography — telephotographic /tel euh foh teuh graf ik/, adj. /tel euh feuh tog reuh fee/, n. photography of distant objects, using a telephoto lens. [1880 85; TELE 1 + PHOTOGRAPHY] * * * …   Universalium

  • telephotography — n. the photographing of distant objects with a system of lenses giving a large image. * * * noun 1. transmission and reproduction of photographs and charts and pictures over a distance • Hypernyms: ↑transmission, ↑transmittal, ↑transmitting •… …   Useful english dictionary

  • Telephoto — [tel′ə fōt΄ō] trademark for a TELEPHOTOGRAPH (sense 2) or a system of telephotography adj. [t ] 1. TELEPHOTOGRAPHIC 2. designating or of a compound camera lens that produces a large image of a distant object …   English World dictionary

  • telephotography — [tel΄ə fə täg′rə fē] n. 1. the art or process of photographing distant objects by using a telephoto lens 2. the science or process of transmitting photographs over distances by converting light rays into electric signals which are sent over wire… …   English World dictionary

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