David-and-Chaslin
PROS: Super sharp in the center and gets even sharper in the center at smaller apertures. Excellent contrasty rendering! Quick and silent AF motor. Small, light, and well built. Has a nice smooth bokeh character. Great resistance to flaring and ghosting. CONS: Lots of vignetting and distortion in raw files. Bokeh can sometimes show onion rings. Edges and corners never get sharp, they in fact get worse as the aperture is closed down. Furthermore, the central circle of high resolution gets smaller instead of larger as the aperture is closed. This is opposite of every other lens Ive owned. I did multiple tests to make sure I wasnt going crazy but this is how the lens performs. The review over at Lenstip confirms this behavior. CONCLUSION: I think Fuji sacrificed a little too much to make this lens as small as it is. The optics need to be bigger/different to account for the resolution loss at the edges. I wouldnt mind if it was a little bigger, more like the size of the 23mm f/2, if it meant getting the lens to sharpen up properly. This lens was almost a winner for me.... I will stick with the f/1.4 version since it doesnt have issues with corner/edge sharpness.