Abe’s of Maine offers the Sigma 17-50mm F2.8 EX DC OS HSM Canon Lens, model no. 583101, for $669. Coupon code “DEALNEWS15” drops it to $624. With free shipping, that’s the lowest total price we could find by $45, although we saw it for $20 less in July. Features include FLD glass elements, anti-shake, 11″ focus, 1.5x magnification, and more.