Leica Elmarit-SL 90-280 mm F2.8-4 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 90 - 280mm. With a max aperture of f2.8, this lens is fast on wide end. The long end is also quite fast at f4.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Leica Elmarit-SL 90-280 mm F2.8-4 is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.