Accessible 4K video shooting is still in its infancy, but it was only a matter of time before it started showing up in consumer cameras. The Panasonic GH line's history of robust video capability makes it a natural fit for 4K, and the new Lumix GH4 squeezes as much as it can into a familiar frame.
While 4K video is the marquee feature, the GH4 is a more than capable still camera as well, with upgrades to nearly every major component of 2012's GH3. A new 16 megapixel micro four-thirds sensor matches the resolution of it's predecessor, though Panasonic is promising increased image quality. Though the difference may not be huge, the major advantage of the new sensor is its faster readout rate, meaning reduced rolling shutter jello effect. The processor is also an upgrade—a Venus 9 engine in place of the GH3's Venus 7. This means increased speed and more effective processing. Other upgrades include a 1/8000 second maximum shutter speed, 1/250 flash sync speed, and a 12 fps burst mode. The GH3 was no slouch in autofocus speed, but a new focusing tech, dubbed DFD (depth from defocus), promises snappier autofocus by actually measuring the bokeh and using lens data to determine focus distance. Unfortunately the new system only works with Panasonic's own lenses.