In the summer of 2008, Panasonic launched the first single-electric camera G1 in the Micro 4/3 system, allowing us to see a swappable lens camera, which is smaller than a DSLR and similar to the size of a super zoom camera. Three years later, the Panasonic G3 continues the touch control of the G2 and appears in front of me with more new functions. I will experience this camera for a month.