Sigma’s 50-100mm F1.8 DC HSM Art is a fast telephoto zoom optimised for DSLRs with APS-C image sensors. This latest addition to Sigma’s acclaimed Art series covers three popular focal lengths in one (85mm, 105mm and 135mm equivalent), which makes it a very useful addition to any photographer’s arsenal. The optical design delivers excellent image quality, and the ultrasonic HSM motor provides silent and accurate autofocus. Thanks to the maximum aperture of F1.8, the lens allows creative use of shallow depth of field. Its high build quality and excellent handling are what we have come to expect from Sigma’s Art series.