
If his camera body is fairly new and does OK images in high iso, I guess a zoom will be sufficient despite letting in a little less light.
( ,
Sun 26 Dec 2010, 10:42,
archived)

Also:
www.digitalbirdphotography.com/cover.html
Fantastic e-book specifically on bird photography.
( ,
Sun 26 Dec 2010, 10:48,
archived)
www.digitalbirdphotography.com/cover.html
Fantastic e-book specifically on bird photography.