(From Sony lens literature) This large-aperture zoom lens comes standard with the Sony Alpha SLT-A77 camera, providing both high performance and a practical focal range. Leading features include bright ƒ/2.8 aperture shooting at all lens settings, a focal range from 16mm wide angle to 50mm tele, built-in SSM for smooth and quiet autofocusing, a circular aperture for beautiful background blur, and resistance against dust and moisture.