Compared to the Laowa 9mm F5.6 FF RF W-Dreamer it offers similar sharpness , lower vignetting but less good resistance to flare. Its field of view is a bit narrower (132° vs 135°)
In China Venus Optics announced the new 10mm f/2.8 Full Frame lens. This is their first autofocus lens made for Sony E, Leica L, Nikon Z and Canon RF mount. Preorders will open next week on Venus Optics store, Amazon and BHphoto.