BuyDig offers the Sigma 30mm f/1.4 EX DC HSM Autofocus Lens for Nikon, model no. 300306, for $289. In-cart, it drops to $249. (If the price doesn’t fall automatically, try coupon code “c113272077″.) With free shipping, that’s $36 under our mention from a month ago and the lowest total price we could find by $40. It features a hybrid aspherical lens.