Tamron SP 70-200mm 2.8 Di VC USD G2 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 - 200mm. With a max aperture of f2.8, this lens is fast on wide end, but max aperture of f22 at tele end makes is really slow at longer focal lengths.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Tamron SP 70-200mm 2.8 Di VC USD G2 is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.