Part of the reason I’ve been confused about what lenses to be looking at for my Rebel T3 is that most fora assume you’re shooting a full-frame sensor like a 1D or 5D. Standard focal lengths for a crop sensor body are different than standard focal lengths for a full-frame body. Because of this there are different best-use lenses at each level. Using this new information and reviews specifically for crop sensor bodies, I’ve put together a good list for my Rebel T3 or a possible future Rebel T2i:
Strategy: Save money by buying slow but clear zooms. Use primes when fast lenses are needed.
Ultra-Wide Zoom (optional): EF-S 10-22mm f/3.5-4.5 USM ($859.99)
Standard Zoom (primary): EF-S 17-55mm f/2.8 USM ($1179.99)
Telephoto Zoom (secondary): EF 70-200mm f/4L USM ($709.99)
Standard Telephoto (primary): EF 50mm f/1.4 USM ($399.99)
Medium Telephoto (secondary): EF 85mm f/1.8 USM ($419.99)
Macro and Telephoto (optional): EF 100mm f/2.8 Macro USM ($599.99)
If I were going to build an entirely new collection from scratch, my priorities would be as follows: Standard Zoom, Standard Telephoto, Telephoto Zoom. But since I already have some lenses, my priorities are instead Standard Telephoto, Medium Telephoto, Standard Zoom, Telephoto Zoom (The only one I currently have isn’t very good).