Panasonic's Lumix GX1 is an interchangeable-lens camera using the Micro Four Thirds System and shares the same Live MOS sensor as its brethren, the Lumix DMC-G3, but has a significantly improved digital image processing engine. And like its predecessors, the Lumix GF1 and GF2, it will use an external viewfinder — the tilt-shift 1.4m dot DMW-LVF2, Live View Finder.