Tamron 15-30mm f2.8 VC USD is an Auto Focus (AF) Wideangle Zoom lens with 35mm FF max sensor coverage. When mounted on a 35mm FF sensor camera, it will give you an FF equivalent focal range of 15 - 30mm. With a max aperture of f2.8, this lens is fast on wide end and equally fast at 30mm with a max aperture of f2.8.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Tamron 15-30mm f2.8 VC USD is not a weather sealed lens, so you have to be extra careful against rain and dust.