The 16-80mm f/3.5-4.5 Carl Zeiss Vario-Sonnar T* DT Standard Zoom Lens from Sony is a professional-grade 5x zoom lens specifically designed for the Sony DT Alpha and Minolta DSLR cameras. The optics of this lens have been optimized for smaller APS-C image sensors used within these cameras. With a crop factor of 1.5x, the equivalent 35mm focal length for this lens is 24-120mm. Carl Zeiss' optical design and anti-flare T* (T-star) coatings used for this lens help to increase contrast and reduce lens flare.
APS-C 35mm Equivalent: 24-120mm
This 16-80mm lens has a 5x zoom factor, and is the 35mm equivalent of a 24-120mm lens on the cropped APS-C cameras it was designed for.
Aperture Range: f/3.5-29
With a maximum aperture of f/3.5-4.5 and minimum of f/22-29, this lens' aperture changes depending on the level of zoom used to capture the image. If you start at 24mm on f/3.5 and zoom to 120mm, the maximum aperture will change to f/4.5.
For DT Alpha & Minolta DSLRs
Optimized for Sony Alpha APS-C sensor cameras, DT lenses employ an optical system that is specifically designed for digital SLR cameras which incorporate an APS-C size CCD image sensor.
Carl Zeiss T* (T-Star) Coating
This Carl Zeiss lens features T* (T-Star) coatings that reduce the lens flare, internal reflections and light scattering that can otherwise occur on the surface of the lens' glass elements.
7x Circular Aperture Blades
Circular aperture blades produce smooth, rounded bokeh background effects when capturing spot-light sources in your pictures. Because the aperture blades form a near circle at the wide openings used for low-light shots, spot-light sources have a pleasing circular defocused effect.
Filter Diameter: 62mm
The 62mm front filter thread does not rotate, allowing rotating polarizing filters to be used.