Tamron 70-180mm F2.8 Di III VXD is an Auto Focus (AF) Telephoto 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 70 - 180mm. With a max aperture of f2.8, this lens is fast on wide end and equally fast at 180mm with a max aperture of f2.8.
Tamron 70-180mm F2.8 Di III VXD is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.