The Lumix GH4 is the latest addition to Panasonic’s G-series system. Complete with a new 16MP sensor that’s said to benefit from new semi-conductor protection technology to reduce image noise and improve dynamic range, the big news is its ability to shoot 4K video (4096×2160 pixels) at a maximum frame rate of 96fps that’s high enough for television broadcast. Autofocus on the GH4 has received one of the more intriguing upgrades. A new system named DFD (Depth From Defocusing) uses a database of all existing Panasonic lenses to estimate how out of focus a lens is and compensate accordingly, fine-tuning the focus with contrast detection. Other notable improvements over the GH3 include a faster 12fps burst or 7.5fps with continuous focusing. In addition, the ISO ceiling has also improved by 1EV to a maximum ISO 25,600. Most viewed links seo manual link building service read more.