Panasonic has announced a  Firmware update 2.5 that introduces several enhancements introduced in Lumix G series cameras since the  GH4 was originally introduced. Post Focus 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. This feature allows you to change 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 BurstA new feature supporting consecutive shooting with flash burst is available with an external flash that is capable of continuous emission. This includes the following Panasonic models:

• Flash Burst Compatible Models
  1. FL580L Compatible
  2. FL360L Compatible
  3. FL500 Compatible *
  4. FL360 Compatible *
  5. FL220 Compatible *

* Discontinued models are compatible but have some restrictions due to slower charge speeds

The firmware will be available at the end of March 2016 from the following link:DOWNLOAD HERE