Though the GH3 has yet to be formally introduced to the world, a video has just appeared on an official Panasonic YouTube channel that has either been posted accidentally or is deliberately intended to build hype in the run-up to Photokina. It mainly shows off the GH3 in a range of picturesque shooting situations, but the clip also spills a few key specs, including the presence of a 16-megapixel sensor, a new version of Panny's Venus Engine processor, a splash- and dust-proof magnesium alloy build and high-definition filming at up to 72Mbps and 60p -- although it's not clear if it handles full 1080 at that high frame-
