Amazon just lowered their price on this Canon EF 70-300mm f/4-5.6 IS USM "budget" telephoto zoom lens. Not the fastest lens, but I’ve used it for two years and have been very happy with it.

Product Features: [LIST][*]70-300mm telephoto zoom lens with f/4.5-5.6 maximum aperture for Canon EOS SLR cameras (full frame)[*]3-stop Image Stabilizer for reducing camera shake; ring-type ultra-sonic monitor (USM)[*]Electro-magnetic diaphragm (EMD) helps create attractive background at large apertures