The Collaborative International Dictionary of English v.0.48:

Telephoto \Tel`e*pho"to\, a.
   1. of or relating to photography with a telephoto lens.
      [PJC]

   2. of or pertaining to a telephoto lens.
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

telephoto \telephoto\ n.
   1. a telephoto lens.
      [PJC]

   2. a photograph taken using a telephoto lens.
      [PJC]

WordNet (r) 3.0 (2006):

telephoto
    n 1: a photograph made with a telephoto lens [syn:
         telephotograph, telephoto]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "Telephoto":
   Photoradiogram, Wirephoto, aerial photograph,
   black-and-white photograph, candid photograph, cheesecake,
   chronophotograph, color photograph, color print, diapositive,
   facsimile, heliochrome, heliograph, montage, mug, mug shot, photo,
   photobiography, photochronograph, photograph, photomap,
   photomicrograph, photomontage, photomural, picture, pinup,
   portrait, radiophotograph, shot, slide, snap, snapshot, still,
   still photograph, telephotograph, transparency