Compare Tamron SP AF17-50mm f/2.8 XR Di II Lens for Canon to Canon EF 85mm f/1.8 USM Telephoto Lens

A lightweight, compact, fast standard zoom lens. Designed for exclusive use with digital SLR cameras (APS-C Size)Two years after Tamron launched the SP AF 28-75mm f2.8 XR Di lens as a standard, compact, fast standard zoom lenses, it remains highly popular with advanced amateur and professional photographers alike. Now Tamron, moving with market trends, has unveiled a new design for fast standard zoom lenses used exclusively for digital SLR cameras that covers the easy to use angles of view the focal length is equivalent to 26-78mm when converted to a 35mm format. In particular, the wide-angle focal length is established at 17mm (26mm equivalent) to obtain a wider angle of view than ordinary standard zoom lenses, while maintaining the remarkably lightweight and compact size of the earlier full frame zoom lens model. Less

A highly practical medium telephoto lens with superb delineation and portability. Images are sharp and clear at all apertures. Through computer simulations, the lens has been designed to give beautiful background blur. Since the front lens group does not rotate during focusing special filter effects are not affected. Less