The Sigma DC was exclusively designed to suit the characteristics of digital SLR cameras. The image circle was designed to match the size of the image sensors of digital SLR cameras. This lens is made by Sigma, a company known for its excellence in lens construction.
The Sigma 18-50mm f/3.5-5.6 DC Autofocus Zoom Lens is a 18mm super-wide-angle to a medium telephoto of 50mm. This compact lens features a maximum diameter of 60mm (2.3 in.), overall length of 67.5mm (2.6 in.) and weight of only 245g (8.6 oz.) The use of aspherical lenses provides correction for various aberrations throughout the entire zoom range and produce high level of optical performance. The 18-50mm f/3.5-5.6 DC lens has a minimum focusing distance of 25cm (9.8 in.) at all focal lengths and is capable of macro photography with a maximum magnification ratio of 1:3.5., resulting in high image contrast and resolution.
