Venus 17mm F4 Zero-D GFX is a Manual Focus (MF) Wideangle Prime lens with Medium Forma max sensor coverage. When mounted on a Medium Forma sensor camera, it will give you an FF equivalent focal range of 0mm. With a max aperture of f4 at 17mm, this is a moderately fast lens.
Venus 17mm F4 Zero-D GFX is not a weather sealed lens, so you have to be extra careful against rain and dust.