Tamron AF 28-200mm f3.8-5.6 XR is an Auto Focus (AF) SuperZoom 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 - 200mm. With a max aperture of f3.8 at 28mm, we can not consider this lens fast on wide end and neither at tele end with its f5.6.
Tamron AF 28-200mm f3.8-5.6 XR is not a weather sealed lens, so you have to be extra careful against rain and dust.