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From time to time Panasonic will issue firmware updates for camera bodies and lenses. Firmware updates are easy to do and will typically consist of bug fixes to improve the performance of your camera or lens. Sometimes a bug fix will even include new features! There have been two firmware updates issued for the G6:
Visit this link to view the latest firmware updates for Panasonic Lumix cameras and lenses. Then follow the appropriate link to the download website and for instructions on how to update the firmware for your G6 and Panasonic lenses.
It is crucial that you use a fully charged battery when updating the firmware on your camera. If your battery goes dead partway through the update process or if you touch any of the controls you risk bricking your camera.