Sony E 55-210mm F4.5-6.3 OSS is an Auto Focus (AF) Telephoto 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 82.5 - 315mm. With the max apertures of only f4.5 at 55mm, and f6.3 at 210mm, the lens is quite slow at both ends.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Sony E 55-210mm F4.5-6.3 OSS is not a weather sealed lens, so you have to be extra careful against rain and dust.