Panasonic GH4
The Panasonic GH4 takes the impressive specs and performance of the GH3 and kicks them up a notch -- a big notch -- with faster burst shooting, quicker AF, and a host of other improvements, not to mention tons of new video features.
Excellent still image quality for its class; Fantastic, highly-detailed video quality; Superior video recording chops with 4K video (both Cinema 4K and Ultra HD); Responsive all-around performer with great AF performance and burst shooting; Rolling shutter is minimal with 60p and 30p video; Splash-...
High ISO performance not as good as some APS-C models (IQ drops quickly past ISO 3200); Overall still image quality not significantly better than the GH3; Sluggish buffer clearing with RAW files; Rolling shutter noticeable on 4K video; Not as compact as most mirrorless cameras, High ISO performance...