There are several new Sigma lens instant rebates that just launched up to $200 off. Check them all out here at B&H Photo.
The Tamron 18-270mm f/3.5-6.3 DI II VC PZD lens just got a $200 price drop and is now available for $449 instead of the former $649 price tag. The Tamron 18-270mm superzoom is an APS-C coverage lens and is available in Canon, Nikon and Sony mounts.
Check it out at the links below.
The new Sigma 120-300mm f/2.8 DG OS HSM lens is available for pre-order in Canon, Nikon and Sigma mounts now for $3,599. Expected ship date is March 16, 2013. Hit the links below to B&H for more details.