'Telephoto lens' definitions:

Definition of 'telephoto lens'

(from WordNet)
noun
A camera lens that magnifies the image [syn: telephoto lens, zoom lens]

Definition of 'Telephoto lens'

From: GCIDE
  • 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]