Voigtlander Nokton 17.5mm F0.95 ASPH is a Manual Focus (MF) Wideangle Prime lens with FourThirds max sensor coverage. When mounted on a FourThirds sensor camera, it will give you an FF equivalent focal range of 36mm. Providing a max aperture of f0.95 at 18mm, this lens is very fast.
Voigtlander Nokton 17.5mm F0.95 ASPH is not a weather sealed lens, so you have to be extra careful against rain and dust.