I took this picture almost as soon as I had the GH4 out of its box. It's hard to remember how revolutionary the GH1 seemed back in 2009. Video autofocus, an Electronic Viewfinder, camcorder-like recording times, 1080/24fps and a swivel screen made it arguably the most advanced video-capable, large sensor, interchangeable lens camera of its time.
But time marches on, and the new Panasonic GH4 quadruples the video resolution of the earlier cameras - and is a much better still camera too.
I'll be taking the GH3, GH4 and the BMPCC up to the Travis AFB air show in Fairfield, CA for a comparison shoot tomorrow. The GH4's battery is charging, and I'll take a few UHS-1 SD cards to experiment with.
I'll be leaving the old GH1 and GH2 behind, though. I don't see a lot of demand for GH4 comparisons with 2009/2010 era cameras.
Results coming soon!