Now your Panasonic GH4 can do post focusing (Same as Lumix GX8) and also record 4K video snaps. Well, in a recent announcement Panasonic said they would release a new 2.5 firmware update till the end of March 2016. You should know that post focus is something through which a user can select an in-focus point after shooting.
Here are the text of press:
Post Focus is a special function that enables users to select an in-focus point after shooting. It has already been integrated in new LUMIX cameras such as the GX8. With this function, users can enjoy changing the perspective for greater photographic expression or to choose the best in-focus shot for macro shooting.
-4K PHOTO (4K Burst / 4K Burst (Start/Stop) / 4K Pre-burst)
With 4K PHOTO mode there are three dedicated modes – 4K Burst / 4K Burst (Start/Stop) / 4K Pre-burst – are all now available on LUMIX GH4*. The addition of these modes further enhances the usability of 4K PHOTO to capture fleeting photo opportunities at 30p.
-External Flash Burst
Consecutive shooting with flash burst is available with an external flash that is capable of continuous emission. This includes the following Panasonic models: DMW-FL580L, DMW-FL360L, DMW-FL500, DMW-FL360 and DMW-FL220
The new DMC-GH4 firmware Version 2.5 is scheduled to be released at the end of March 2016 at the LUMIX Customer Support website: http://panasonic.jp/support/global/cs/dsc/