The Sigma 10-20mm f/3.5 EX DC HSM Autofocus Zoom is a super-wide angle lens with a relatively bright f/3.5 maximum aperture throughout its zoom range, helping to ensure high image quality. The lens gathers enough light to make it a great choice for indoor shooting as well as landscapes and creative portraiture. This version of the lens is exclusively made to fit Sony's Alpha lens mount, which is also shared by the discontinued Minolta Maxxum cameras. It is not intended for use with Sony's "full frame" digital SLR cameras, or for any film-based Minolta Maxxum cameras.