Adorama takes cuts prices on select Pentax Digital SLR Lenses via coupon code "S102831013". With items starting at $159.95 after discount with free shipping, many models are at or near the lowest total price we could find. Deal ends October 31.

A best bet is the Pentax SMCP-DA 10-17mm f/3.5-4.5 (IF) Auto Focus Fisheye Zoom Lens (pictured), model no. 21580, for $546.95 before the above code, $499.95 after. With free shipping, that's the lowest total price we could find by $47.