As one of its daily deals, B&H Photo-Video offers the Sigma 10-20mm f/4-5.6 EX DC HSM AF Super Wide Angle Zoom Lens for Canon EOS DSLRs, model no. 201101, for $249.95 with free shipping. That's $19 under our May mention and the lowest total price we've seen. (It's a current price low by $111.) It features three SLD glass elements, a minimum focusing distance of 9.4", and angle of view of 102.4° to 63.8°. Deal ends today.