The only con - Price
Build & ERGONOMICS
I find it hard to describe how it feels to be able to select apertures on the lens again. Nikon and Canon have done away with the aperture ring in the name of progress, but now that I’m using an aperture ring again it's like returning to my roots, it’s like being reborn. This is what photography is about. My only criticism would be that the aperture detents aren’t deep enough which means they knock out of position easily otherwise a perfect lens.
Images taken with the XF 23mm f/1.4r
For those wondering what happens if you do stop down, the image quality improves even more with sharpness and contrast peaking by f/5.6. Edge performance is also very good if not outstanding, with f/2 being a good choice if you desire a fast aperture together with very good edge performance. This lens is so good it outperforms the full frame equivalent Nikkor AFS 35mm f/1.4 especially wide open and at edge performance.
Overall, the XF 23mm lens is optically just about perfect, excelling at sharpness, falloff and distortion. And if the unbelievable sharpness was not enough to buy this lens then the bokeh might be a consideration. The bokeh is surprisingly very pleasant especially considering its such a wide angle lens.
So let me repeat myself, solid build, extremely sharp from wide open, from f/2 sharp all the way to the edges of the frame, no distortion to talk about and the slightly noticeable falloff is corrected for the most part by software, flaring is well controlled and I find it hard to get any color fringing (though its present), fast AF and the pleasant bokeh is the icing on the cake! Definitely the best wide angle lens I have ever tested.