Samsung 16-50mm F2.0-2.8 S ED OIS is an Auto Focus (AF) Standard Zoom lens with APS-C / DX max sensor coverage. When mounted on a APS-C / DX sensor camera, it will give you an FF equivalent focal range of 24 - 75mm. Providing a max aperture of f2 at 16mm, this lens is remarkably fast on wide end. Even better, having an aperture of f2.8 on tele end, this lens is exceptionally fast through out its range.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Samsung 16-50mm F2.0-2.8 S ED OIS is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.