redtagcamera via eBay has the Sigma 17-50mm F2.8 EX DC OS HSM for Canon (grey market) for only $249.99.

This is a great deal for this crop-sensor, optically-stabilized lens, which already delivers terrific value. Please note this not an authorized Sigma USA dealer, so you do not get the Sigma USA warranty. However, at this price, you probably can’t go wrong. This lens usually retails for $369.

redtagcamera via eBay has the Sigma 17-50mm F2.8 EX DC OS HSM for Canon (grey market) for only $249.95, when you apply coupon code “PRESDAY” at checkout.

This is a great deal for this crop-sensor, optically-stabilized lens, which already delivers terrific value. Please note this not an authorized Sigma USA dealer, so you do not get the Sigma USA warranty. However, at this price, you probably can’t go wrong. This lens usually retails for $369.

Sigma authorized dealer BuyDig has the Sigma 17-50mm F2.8 EX DC OS HSM for Canon for $299.00. This is the lowest price we’ve seen yet for this lens. Add to cart to see the discounted price. Several free bonus accessories are included with this lens.

This is a fantastic price for a lens that delivers excellent value — f/2.8 aperture and image stabilization. Please note this is a lens designed for crop-sensor cameras.

B&H Photo Video has the optically-stabilized Sigma 17-50mm F2.8 EX DC OS HSM for Canon for $399.00. This is the lowest price we have seen from an authorized dealer. B&H is also offering a 4% (or $16) reward. This deal ends on December 5 (tomorrow) at midnight. As usual, the B&H website is open but checkout is closed from Friday evening to Saturday evening.

Amazon also has the Sigma 17-50mm F2.8 EX DC OS HSM for Canon for $399.00. No deal expiration date is mentioned on the page.

Today’s eBay Daily Deal: BuyDig via eBay has the optically-stabilized Sigma 17-50mm F2.8 EX DC OS HSM for Canon for $429.99. They’re an authorized Sigma retailer, and this ties for the lowest price from an authorized dealer that we’ve seen, since tracking this lens in 2011.

Compare with other authorized retailers who are currently asking $569 for this lens. This lens was due for a price-drop as the Canon equivalent EF-S 17-55mm f/2.8 IS saw a price drop from $1059 to $829 last year. At a little more than half the price, this Sigma version is a fantastic deal.

This deal is back: Roberts Camera via eBay has the optically-stabilized Sigma 17-50mm F2.8 EX DC OS HSM for Canon for $429.99. They’re an authorized Sigma retailer, and this ties for the cheapest price from an authorized dealer that we’ve seen since tracking this lens in 2011.

Compare with other authorized retailers who are currently asking $569 for this lens. This lens was due for a price-drop as the Canon equivalent EF-S 17-55mm f/2.8 IS saw a price drop from $1059 to $829 over the last few months. At a little more than half the price, this Sigma version is a fantastic deal.