Venus Laowa 105mm F2 Smooth Trans Focus is a Manual Focus (MF) Telephoto Prime 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 105mm. Providing a max aperture of f2 at 105mm, this lens is very fast.
Venus Laowa 105mm F2 Smooth Trans Focus is not a weather sealed lens, so you have to be extra careful against rain and dust.