accutance at f/1.4 68% in centre, 61% at edge improved at f/2.8 to 82% accutance centre, 66% at edge
1.7EV vignetting at f/1.4
4 micron lat CA
excellent bokeh but some onion ring
like most recent Sony lenses, focuses stopped down at your selected aperture. This means that autofocus performance steadily drops as you stop down, since smaller apertures mean less light, and more depth-of-field (less phase difference) for the autofocus system to work with. By F9, phase-detect fails altogether, and you'll experience significant hunting in AF-C.