One of the features added to the Sony Ericsson Xperia X10 at the Android 2.1 update was continuous autofocus. It’s a nice feature that works reasonably well. If you’re wondering how the Xperia arc compares, then check out the couple of videos below that shows this off to good effect. The focus lock appears to be as fast as the X10, although it’s difficult to tell if they’re any faster. We’ll be able to give you an official judgement on this once we get hands-on with the retail handsets later this month.