The Sigma 10-20mm has been long been a popular lens for real estate photographers. I just noticed that Tamron announced the Tamron SP AF 10-24mm F3.5-4.5 Di II LD Aspherical last year at Photokina 2008. This announcement slipped right by me at the time.
The price/quality point of the Sigma 10-20 and Tamron 10-24 is the the most popular for real estate photography. The Sigma has been the best ultra-wide-angle for the money for some time and Tamron appears to be trying to challenging this position. The street price of the Sigma 10-20 is around $430 and the Tamron is around $475. In the dpreview lens review of the Tamron Andy Westlake says:
"The 10-24mm enters the market keenly priced to compete with similar lenses from Sigma and Tokina, and is therefore substantially cheaper than the wide angle zooms available from the camera manufacturers themselves. This combination of high specification and relatively low cost will no doubt appear compelling to many potential buyers."
Main Features of Tamron 10-24mm
Right now the Tamron 10-24mm is only available for Nikon but all the major lens mounts are to be supported. I'll be adding the Tamron 10-24 to my real estate photographer's lens table. I apologize for not getting it on sooner. Does anyone out there have one a Tamron 10-24?