Tiny, well made and downright gorgeously designed lens. At wider apertures, it isn't very impressive, but around f/4 and f/5.6 it is surprisingly sharp across the field (f/2 makes the center useable, f/2.8 is actually rather good). The lens of this size in the older times would probably be a 35/3.5 and if you use it as one, it will give you some good quality pictures. Color is neutral in temperature, but quite punchy. Microcontrast is moderate and the pictures respond well to sharpening. There is noticeable distortion and wide open, quite pronounced vignetting, which goes away a few stops down. I think the only way to get rid of the distortion and improve resolution wide open would be to make imaging circle a big bigger, which, in turn, would make the lens bigger. Ergonomically, I love the clicky aperture ring, but the focusing ring could have a wider grip. I understand that the lens diagram has to be there, but still, it would have been nice. The focus throw is quite short, so nailing focus at wider apertures can become challenging. Edit: This lens is very good for crystal ball photogrpahy. With a 10mm extension ring, the ball fills the frame almost edge to edge.
