Canon EF-M 22mm f2 STM is an Auto Focus (AF) Wideangle Prime 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 33mm. Providing a max aperture of f2 at 22mm, this lens is very fast.
Canon EF-M 22mm f2 STM is not a weather sealed lens, so you have to be extra careful against rain and dust.