Hmmmmmmmmmmm.............well, I was wrong. His budget *is* a major factor in his choice of lenses. Based on your budget, I'd suggest this:


Renting either the


Canon 400mm f/5.6L for $52 insured + shipping


or the


Canon 300mm f/4L IS with the 1.4x Extender for $78 insured total + shipping


Prices quoted are from lensrentals.com and are for a 7 day period. I'd highly suggest using the "RENT" links in the lens reviews here on the-digital-picture. Personally, I'd go with the 300mm lens with the 1.4x extender so that you'd have IS and have the option of using the lens at 300mm or 420mm. I'd strongly recommend taking a monopod if you have one, but turn the IS off when using the monopod as the IS isn't tripod sensing.