Tamron 10-24mm F3.5-4.5 Di II VC HLD is an Auto Focus (AF) Wideangle Zoom lens with APS-C / DX max sensor coverage. When mounted on a APS-C / DX sensor camera, it will give you an FF equivalent focal range of 15 - 36mm. With a max aperture of f3.5 at 10mm, we can not consider this lens fast on wide end, and it is slow at the tele end with its max aperture of f22.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Tamron 10-24mm F3.5-4.5 Di II VC HLD is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.