This lens is sharp enough even at f/1.4! Impressive lens for landscapes, great low light performance and while I'm not usually a fan of wind angle portraits, the fading and bokeh of this lens means I can take great portraits with it when I want to! The autofocus seems to be quite capable. I'll probably do an MFA on this lens at some point like I do on all other autofocus lenses, but I certainly don't feel the need to do so.