Sony recently shook things up with the announcement of the 42.4MP, backside-illuminated full-frame a7R II mirrorless camera, alongside stacked 1"-type sensors in the updates to the popular RX100 and RX10 lines. While stills and video quality are sure to break new ground with these updates, perhaps even more interesting are the autofocus improvements. We put the new AF systems to the test in our brief hands-on time with the cameras recently. ... more