This zoom lens was exclusively designed for use with digital Single-Lens Reflex (SLR) cameras and has a 6.9:1 zoom ratio. The image circle is designed to match the size of the image sensor of digital SLR cameras.From wide angle to telephoto, this new zoom lens can capture a wide range of subjects. As there is no need to change lenses, there is no risk of missing those great shots. This lens has a minimum focusing distance of 50cm (19.6in.) at all focal lengths and a maximum magnification of 1:5.3. A distance scale on the focus ring makes the lens convenient and easy to use.Sigma's vast experience has been gained over many years in the development of advanced optical technology and film camera production. This experience was crucial to the development of the SD9 and SD10 digital SLR cameras. Sigma took digital characteristics into consideration when designing the lens power layout and created the most suitable lens.
