Complex sentence: Significantly, the G3 introduces a new, small design package design philosophy, approximating the size of the then smallest available Panasonic MFT camera, the Panasonic Lumix DMC-GF2, but with an electronic viewfinder and an articulated LCD panel.
Split into simpler sentences: Significantly, the G3 introduces a new, small design package design philosophy. Physically, the G3 approximates the size of the then smallest available Panasonic MFT camera, the Panasonic Lumix DMC-GF2, however, the G3 includes an electronic viewfinder and an articulated LCD panel.