Panasonic has unveiled its latest convertible tablet device, the Let’s Note CF-C1, touted as the world’s lightest convertible tablet PC, weighing in at 1.46kg. The company was apparently able to keep the weight of the device down by choosing lighter materials and changing the display’s open-close and rotating mechanisms. The CF-C1 is slated to go on sale on June 25th for $2,170. Specifications of it include: