Adorama is offering the Sigma 150-500mm f5-6.3 DG APO OS for $740 with free shipping when you enter coupon code 1SGMAJUL99 at the Adorama checkout page. This is available in the Canon, Nikon, Pentax, Sony Alpha and Sigma SLR mounts. The same coupon code also gets you the 10-20mm f4-5.6 DC EX HSM lens for $350 and the 85mm f1.4 EX DG HSM for $850. See them all at the Adorama Sigma Lens sale. Promotion ends by 7/31/14 or earlier if sold out.