Panasonic confirmed rumors Thursday by launching its first third-generation Lumix, the G3. The camera is considered the smallest swappable-lens model to still pack a viewfinder and does so by moving some of its button and dial controls to its three-inch, swiveling touchscreen. Autofocusing is also much more powerful: it now can not only get finer-grained tap-to-focus control but has a new precise contrast AF routine that can lock in as quickly as a tenth of a second (on a 14-140mm lens) by doubling the CMOS sensor's live sample rate to 12
