Tamron SP 90mm f/2.8 Macro Releases November 30th at $849

Of course, that's not to say that the lens is changed completely. Tamron's 90mm lenses have always delivered in the blur department and the company says that the rounded diaphragm and low dispersion - one LD and two XLD - elements combine for sharp images and spectacular blur.
The new lens will be available in Canon mounts on November 30th. Approximate Retail Value is $849. Nikon and Sony mounts will follow.
Visit Tamron's website for more details.