Samsung 45mm F1.8 2D/3D is an Auto Focus (AF) Standard 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 67.5mm. Providing a max aperture of f1.8 at 45mm, this lens is very fast.
Samsung 45mm F1.8 2D/3D is not a weather sealed lens, so you have to be extra careful against rain and dust.