Viltrox is a new brand in the world of lenses. I have many wide-angle vintage lenses, but they have all one thing in common, they are not very fast. So I was interested in testing a 20mm lens that was great for low light The lens is very well made, in a very resistant metal, but it comes with a price : it's heavy, very heavy Weight :775g almost as heavy as the camera body. but I didn't feel it was a real problem, even handheld for a long time. Extreme wide I think there is a WOW factor with this lens when shooting very wide landscapes, it's not deformed like with an 11mm lens. You can feel like you are standing in front of this landscape when you look at the photo