The Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon is a wide-angle to normal-length zoom lens that features a fast bright constant f/1.8 maximum aperture. It is specifically designed for use with APS-C-sized sensors and provides a 35mm-equivalent focal length range of 28.8-56mm. The lens integrates four aspherical elements into its construction as well as five Special Low Dispersion SLD glass elements to help minimize various aberrations and distortions throughout the zoom range as well as provide greater image sharpness and clarity. A Super Multi-Layer Coating has also been applied to lens elements to reduce surface reflections lens flare and ghosting to produce images with higher contrast and color fidelity. The lens barrel design is constructed from a Thermally Stable Composite TSC material that is akin to metal in texture and resistance to temperature and environmental changes while also remaining lightweight and compact. An internal focusing and zooming mechanism also helps to maintain a compact and consistent overall length and non-rotating front ring also better enables the use of circular polarizing filters. For control of focus a Hyper Sonic Motor HSM is used to ensure fast precise and quiet focusing capabilities that are well suited to continuous shooting and movie recording.
- 18-35mm focal length 27-52.5mm equivalent focal length on APS-C cameras
- F1.8 maximum aperture; F16 minimum
- Ring-type ultrasonic-type AF motor with full-time manual focusing 72mm filter size
- Minimum Focusing Distance 28 cm/ 11.0 in
- Available in Canon EF EF-S Sony Alpha DT Nikon F DX mounts