Adorama has the Sigma 10-20mm F4-5.6 EX DC HSM for Canon for $385.00. Use coupon code 1SIGMASALE which you enter during checkout (before you enter your payment info).
This is the lowest price ever that we’ve seen for the Sigma 10-20mm F4-5.6 EX DC HSM, and is $45 lower than other authorized dealers at this time. Free shipping.
It’s not surprising that this ultra-wide angle lens for crop bodies is coming down in price — there are two excellent Canon alternatives at similar price points that you should also consider: the EF-S 10-22mm f/3.5-4.5 is $441 Refurbished and the newly announced EF-S 10-18mm f/4.5-5.6 IS STM is available for $299.