This 27mm wide angle to 82.5mm medium telephoto equivalent (35mm full frame format) range in a compact 3x E-mount zoom that is suitable for landscapes, snapshots, portraits, and more. Built-in Optical SteadyShot (OSS) provides approximately a four-stop image stabilization advantage, and an internal drive motor ensures smooth, quiet autofocus and aperture operation. When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh' effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result.