Tamron's high-power zoom lens is a photographer's dream come true — it is the result of Tamron's continuing mission to develop the world's most unique "one-lens-does-it-all" zooms to satisfy their customers' desire. While conventional 35mm film cameras required two lenses to cover 28-388mm, Tamron's new zoom is 13.9X, delivering enormous photographic freedom in a single compact lens.
As part of Tamron's Di II series, the 18-250mm is designed for exclusive use on digital cameras with smaller-size imagers and inherits all of the benefits of their Di products. This lens is not designed for conventional cameras and digital cameras with image sensors larger than 24mm x 16mm.
Built-in Motor allows for use on Nikon's D40 and D40x as well as the rest of Nikon's DSLR line.