Adorama offers the Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM Lens for Nikon, model no. 883-306, or Canon, model no. 883-101, for $349. Coupon code "260SIGMALS" cuts either model to $260. With free shipping, that's the lowest total price we could find by at least $59, although they were both $10 less in March. It features a minimum aperture of f/22 and seven diaphragm blades. Deal ends May 27.