Sony has taken the time to upgrade the firmware on its minuscule NEX-5/3 system cameras to improve usability, make manual focusing easier, and allow single-shot autofocus when using A-mount glass via an adapter. The latter will be perhaps the most important thing for owners of Sony's large-sensor compact, allowing them to use a total of 14 lenses from the company's DSLR range without having to worry about focusing manually. Though, if you are into that kind of thing, the MF Assist mode has been improved with a new feature giving you a zoomed-in view of the area you're trying to keep sharp -- to make it easier to tell if you're doing it right. The UI has also under
