You need to get yourself an 18.75mm lens
- That's the trade-off with the smaller sensor's 'crop factor'. On the other hand you do gain on the telephoto end of a lens.
I have both 35mm film and a crop body digital (20D), and that was the first thing I had to deal with when I went over to digital a couple of years ago. You just have to spend the money on wider lenses I'm afraid.