Adorama offers the Canon EF-S 10-22mm f/3.5-4.5 USM SLR Camera Lens, model no. 9518A002, for an in-cart price of $649 with free shipping. That's a buck under our mention from five days ago and the lowest total price we could find now by $73. This lens is compatible only with the 1.6x crop Canon SLRs; the 50D, 60D, Rebels, etc.