Since no APS-C (EFS) body 30D, 40D, 50D etc. yet supports a true robust weather seal the L build treatment might be moot. If you really desire L in asimilarfocal length try the 16-35L or 17-40L.


I've used a 17-40L as my general lens for a long time on my 30D and then 40D prior to buying a 17-55 EFS. I currently use the 16-35L on my 40D from time to time. 9 out of 10 days it's very difficult to tell these 3 lenses apart in use - save for the constant type length of the L's. Of all 3 I think the 17-40L was actually my favorite, it's also the least expensive if you can forgo the stop.