The Sigma 18-35mm f/1.8 DC HSM A1 for Canon is a high quality zoom lens designed specifically for crop-frame Canon EF-mount cameras. Key features include:

Great for landscape, event, and street photography

Excellent image quality, clarity, contrast, and sharpness

Fast, smooth, and quiet autofocus

Internal zoom and focusing

Fast f/1.8 Aperture Zoom. While most zoom-lens apertures top off at f/2.8, the Sigma 18-35mm bests that by 1 1/3-stops. This enables stellar low-light shooting while providing full-frame style depth of field on a crop-frame camera.

Wide to Normal Range. With a 35mm-equivalent focal length of 29mm-56mm, it covers your wide to normal range. This makes it a great option for landscape, event, and street photographers.

Hyper Sonic Motor Autofocus System. Provides fast, smooth, and quiet operation in a wide variety of shooting situations. You can also manually override the autofocus motor at any time by rotating the focusing ring, giving you quick fine-tuning ability.

High Build and Image Quality. As a part of Sigma’s Art lens line, the DC HSM A1 goes through Sigma’s rigorous A1 testing, ensuring high image quality. Its four aspherical elements and five Super Low-Dispersion glass elements are used to minimize distortion and aberrations throughout the zoom range, with Super Multi-Layer coatings for eliminating lens flare and ghosting. The barrel is made of a lightweight Thermally Stable Composite that gives the lens a solid, sturdy feel. This lens also offers internal focusing and zooming.

Dock Compatible. As part of Sigma’s Global Vision series, this lens is compatible with the Sigma USB Dock for Canon EF Lenses (separate rental item), allowing you to adjust the focus limiter, AF speed, microfocus, and OS settings through the Sigma Optimization Pro software.