There are 2 lenses you should have in your camera bag which will cover 95% of most users needs. I do believe that Canon prices their lenses a little too high, but who doesn't. Many users a lot of money on a camera body and very little on glass. The first thing I noticed is that the colors are more vivid. The lens is much more efficient with light, especially with low light conditions. This lens will last me through many generations of camera bodies. And for the other lens you need, 70-200 L Is USM 2.8.