I am looking for a wide-angle lens for my 30D that's under $600, but can also fit a full-frame sensor down the road. I was looking at both the Tamron 10-24mm and Sigma 10-20mm, but both are for APS-C sensors only. Now the likelihood of me getting a new camera won't be for a few more years, but I would like to have most of my lenses compatible when the change does come. Should i bother with that hope, or just go with buying lenses with this restriction?




