Panasonic began aggressively courting professional videographers with its Lumix GH3 back in 2012, offering advanced video codecs, extensive controls, time code features, and other things that videographers demand. Now its taking that step even further with the new Lumix GH4, the first interchangeable lens mirrorless camera capable of recording high-resolution 4K video. The GH4 looks very similar to the GH3, aping the appearance of a DSLR, only slightly smaller. It has the same 16-megapixel resolution for still photos as the GH3, but Panasonic says the GH4s new Micro Four Thirds sensor does an even better job of suppressing rolling shutter effects and has greater dynamic range.