Purchased this as a lightweight walk around, everyday lens - found a 55 to be too tight and the 35 to be too heavy. While I wasn’t impressed out of the box (the lens feels a little cheap, and it I’m not entirely sure I was the first owner) I stuck with it and I was impressed, plenty sharp enough in the middle wide open and a decent bit of character to the bokeh. Thought it also handled colour well and is reasonably well corrected for fringing. The auto focus is pretty snappy in all light except near darkness and as an added bonus it has no issues with coma, to the point where I was able to get decent milky way results whilst working away in Devon. This is not a lens for pro use by any means but as a day to day all rounder it’ll do just fine.

This lens is compact and light, with a useful focal length. AF speed is good, accuracy in general was also very consistent. Optically I found it sharp with good, but not outstanding colour and contrast. In difficult situations mine struggled somewhat with purple fringing.
However, it's not without problems especially at the launch price of £350. Build material quality felt cheap, the hood in particular felt like a flimsy toy. The most significant issue was the lenses 50-50 ability to focus to infinity, with multiple attempts needed even in very high contrast scenes. This may well be fixed via firmware, but you'll need a dock to do so. The bayonet mount also felt overly tight and required more force than other lenses to mount, feeling a little "scratchy".
I really wanted to replace my zeiss 55mm with this as I much prefer the wider fov, but, optics (mostly) aside, it's not in the same quality bracket, which I suppose comes with the price.

This lens is compact and light, with a useful focal length. AF speed is good, accuracy in general was also very consistent. Optically I found it sharp with good, but not outstanding colour and contrast. In difficult situations mine struggled somewhat with purple fringing.However, it's not without problems especially at the launch price of £350. Build material quality felt cheap, the hood in particular felt like a flimsy toy. The most significant issue was the lenses 50-50 ability to focus to infinity, with multiple attempts needed even in very high contrast scenes. This may well be fixed via firmware, but you'll need a dock to do so. The bayonet mount also felt overly tight and required more force than other lenses to mount, feeling a little "scratchy".I really wanted to replace my zeiss 55mm with this as I much prefer the wider fov, but, optics (mostly) aside, it's not in the same quality bracket, which I suppose comes with the price.