Amazon offers the Canon EF 24-70mm f/2.8L II USM Zoom Lens, model no. 5175B002, for an in-cart price of $1,999. This $300 mail-in rebate cuts it to $1,699. With free shipping, that's a buck under our mention from two weeks ago (which required pickup) and the lowest total price we've seen. (It's also a price low of $269.) It features one Super UD and two UD lens elements that minimize chromatic aberration in the periphery and color blurring around the edges of the subject. Rebate expires January 4.

Update: This order will also earn 2% back in Amazon Rewards, which will convert to a $40 Amazon credit. Assuming you use the credit, that's $41 under our mention from two weeks ago (which required pickup) and the lowest total price we've seen. (It's a current price low by $309.) The credit will automatically appear as a promotional code applied to your account 35 days after shipment; it's good for six months.