<p>Exclusively designed to suit the characteristics of digital SLR cameras. The image circle was designed to match the size of the image sensors of most digitalSLR cameras and this has resulted in a compact lightweight lens. Sigma has incorporated an HSM Hyper Sonic Motor into the 18-50mm F3.5-5.6 DC HSM, that now allows quite and high-speed autofocusing with all Nikon DSLR cameras.</p>
