This Tamron 28-80mm and 70-300mm Di LD Macro Two Lens Kit lens kit consists of two lenses, a wide-angle zoom lens and a telephoto zoom lens.
The 28-80mm lens is a standard zoom lens that offers a view ranging from a wide 28mm to a medium telephoto range of 80mm. The use of aspherical elements in the front group reduces the number of elements required, and the use of strong engineering plastic in the barrel makes the body light.
The 70-300mm Di LD lens is a compact ultra tele-zoom lens which covers 70mm to 300mm ultra telephoto, with a maximum magnification ratio of 1:2 at the tele-end. It delivers ultimate handling ease and portability in the field due to its lightweight size and mechanical operation. Best suited for shooting outdoors to make full use of the real telephoto of 300mm as well as providing diversity in portraiture using the medium focal length ranges of 70mm to 135mm.
Di (Digitally Integrated Design) is a designation Tamron puts on lenses featuring optical systems designed to meet the performance characteristics of digital SLR cameras.