The AF18-200mm F/3.5-6.3 XR Di-II LD Aspherical (IF) MACRO (Model A14) a new high power zoom lens designed exclusively for digital SLR cameras using APS-C size image sensors. The new AF18-200mm f/3.5-6.3 XR Di-II LD Aspherical (IF) MACRO is a high power zoom lens for exclusive use with digital (APS-C size) SLR cameras that inherits the product concept of the existing AF28-300mm f/3.5-6.3 XR zoom lens. Even two years after its introduction the current AF28-300mm is still a favorite and highly evaluated by photographers around the world as a representative model of high power zoom lenses. With the market influx of digital SLR cameras in recent years the use of high power zoom lenses has become increasingly popular since high power zooms provide the convenience of handling many photographic scenes and the capability of shooting ultra telephoto shots without changing lenses. The popularity of this focal length led Tamron to initiate the development of new zoom lenses to further meet the needs of digital SLR photographers. The result is the successful development of a new zoom lens exclusively for use on digital SLR cameras. The wide to ultra tele focal range of this lens will allow digital SLR camera owners to enjoy digital photography with comfort and convenience. * "Di (Digitally Integrated design)-II" is the designation Tamron puts on lenses designed for exclusive use with digital (APS-C size) SLR cameras featuring optical systems optimized
- For digital SLR photography it provides high image quality in terms of resolution contrast and flatness of image field
- Designed to confine the changing angles of incidences of light rays reaching the imager within a certain scope
- Peripheral light fall-off is minimized when compared with that of conventional lenses for film cameras
- Complicated mechanisms are built in the compact body thanks to new mechanical artifices.
- The Zoom Lock prevents unwanted barrel extension when carrying the lens/camera combination
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