Tamron AF 28-80mm f3.5-5.6 is an Auto Focus (AF) Standard 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 28 - 80mm. With a max aperture of f3.5 at 28mm, we can not consider this lens fast on wide end and neither at tele end with its f5.6.
Tamron AF 28-80mm f3.5-5.6 is not a weather sealed lens, so you have to be extra careful against rain and dust.