From WordNet (r) 3.0 (2006) [wn]:
telephoto
n 1: a photograph made with a telephoto lens [syn:
telephotograph, telephoto]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
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.]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
telephoto \telephoto\ n.
1. a telephoto lens.
[PJC]
2. a photograph taken using a telephoto lens.
[PJC]