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focal length

NOUN
  1. the distance from a lens to its focus

How To Use focal length In A Sentence

  • They have exploited this radical abbreviation of focal length to develop a prototype of a credit-card-thin camera.
  • Calculate the equivalent 35mm film focal length from the AOV AOV = arctan (28.62/72) * 2 Netvouz - new bookmarks
  • A typical lens has a focal length ( f ) of 625 mm.
  • Experiments on dynamic focusing control of the TN-LCSLM based on Fresnel zone lens are carried out. Measured focal lengths are in good agreement with the designed ones.
  • The aperture size (area of the aperture) of a lens could be calculated from focal length and the correspondent f-number.
  • The rule of thumb is never to hand-hold the camera at a shutter speed lower than your lens' focal length.
  • The long focal length portion of the lens focuses to one fovea for viewing in air; the other short focal length focuses below water.
  • The image produced by a diverging lens is however frequently virtual and consequently the focal length does not seem easy to determine.
  • It is an optical device, somewhat like a viewfinder, which allows me to vary the focal length at will.
  • My continued doubts about the Nikon 10-24 regard the "smeary" corners at wider focal lengths on most, but not all, images I've seen. News: Digital Photography Review (dpreview.com)
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