Unique Photo takes $50 off any Sigma camera lens of $250 or more via coupon code "SIGMA50". Even better, all lenses qualify for free shipping. Combined, that puts many models at or near lowest-we've-seen prices.

Notable is the Sigma Super Wide Angle 18-200mm F3.5-6.3 DC Aspherical (IF) Lens for Canon (pictured), model no. 777101, for $229 after the above coupon. With free shipping, that's the lowest total price we could find by $50.