Tamron is proud to have introduced the concept of their high-power zoom lens with AF 18-200mm XR Di II -- for exclusive use with digital SLRs. Tamron's original development of proprietary core technologies such as Aspherical element production, Multiple Cam Mechanism and Integrated Focus Cam design lend to the creation of the world's lightest, most compact 11.1X zoom lens made for digital SLR cameras. The 18-200mm (28-300 when converted to 35mm) provides the digital photographer with the versatility of a true wide to ultra tele zoom in an amazingly easy to use design.
Tamron's Di II lenses are designed for exclusive use on digital cameras with smaller-size imagers and inherit all of the benefits of their Di products. These lenses are not designed for conventional cameras and digital cameras with image sensors larger than 24mm x 16mm.