Abe’s of Maine offers the Sigma 50mm f/1.4 EX DG HSM Lens for Canon, model no. 310101, Sony, model no. 310205, Nikon, model no. 310306, or Pentax, model no. 310109, for $499. Coupon code “LOYALTY15″ drops it to $454. With free shipping, that’s tied with our mention from three weeks ago and the lowest total price we could find for any model by $45. It features full-time manual focus override.