Which Canon body are you using? Whether you have a full frame or body that has the 1.6 crop factor I would still go with the wider angle lens. Especially if it has the 1.6 factor. The EF lenses will fit on both, the EF-S lens will not fit the full frame body. Remember, you can always crop the composition you want as well. Hope this helps,good luck.

Leaving Raleigh 40w to Santa Fe then up for Sturgis bike wk. Coming back thru Appalachia West Virginia and home. Any advice re: special things or places 3-4 wk. trip are greatly appreciated.