7Artisans / DJ-Optical mirrorless lenses

There is a new Chinese lens manufacturer that produces some interesting and very cheap mirrorless lenses sold under the 7Artisans / DJ-Optical brand:

7.5mm f/2.8: APS-C fish-eye lens for MFT, Fuji and Sony E mounts (price: $139)
25mm f/1.8: APS-C wide-angle lens for MFT, Fuji and Sony E mounts (price: $70, sample photos)
35 mm f/2: full frame lens for Canon EF-M, Fuji and Sony E mounts (price: $156, more info here)
50mm f/1.1 for Leica M mount (the cheapest Leica M mount lens available today at $369, sample photos)
They even have a 50mm f/1.0 lens shown in the picture above (silver lens in the top middle)