How much does this cost to the nearest dollar?

Sigma APO DG OS HSM SLD Ultra Telephoto Zoom Lens for Canon Digital SLR Camera
Sigmas APO DG OS HSM is an advanced optical design of this 10x power high-performance zoom lens that covers the standard-to-super-telephoto range, now with the added advantage of Sigmas own Optical Stabilization which offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. Sigma is the only one to offer OS for Sony and Pentax mount where the image is stabilized in the viewfinder if chosen. For many photographers, having an all-in-one lens is an absolute dream. Especially for nature photographers, the idea of a lens suitable for landscape photography at the short end of the zoom range, while still having enough reach for wildlife is a

Price is $800.00

Price: $800