Sigma 18-35mm f/1.8 Art DC HSM - Sony A

The world's first F1.8 zoom lens with F1.8 aperture. Sigma's new Art series, a state-of-the-art quality lens for APS-C cameras (equivalent to a focal length of approx. 27mm - 52.5mm, depending on the camera). This highly luminous constant zoom lens opens up new possibilities for all studio, personal, landscape and fine art photography. The large F1.8 aperture allows you to blur the background of your subject. You'll see everything brighter and sharper from the camera's viewfinder as soon as you take the picture. The lens' five SLD (Special Low Dispersion) glass elements compensate for colour dispersion (aberration) caused by light exposure. Four aspherical lens elements provide maximum correction against dispersion and distortion, enabling high optical image quality throughout the focal length range. Multiple lens coatings and internal floating focus system. HSM autofocus motor (ultrasonic motor) for fast and quiet focusing. Manual focusing option. Great lens for landscape and indoor use.
Digital Photography Review

“The Sigma 18-35mm F1.8 DC HSM is an extraordinary lens, offering prime-level image quality in the fastest zoom ever made for SLRs. Its 28-50mm equivalent range is a little limiting though, and inconsistent autofocus means that it can be difficult to make the most of the excellent optics when shooting at large apertures.

The product comes with a 1+4 year warranty (requires registration).

Sigma additional guarantee: register here