Release notes for the new v1.4 firmware for the Panasonic Lumix DMC-G1 digital camera describe two changes as compared to the previous release. Auto focus performance for low-contrast subjects is said to have been improved, as has auto exposure stability when using the upcoming LEICA DG MACRO-ELMARIT 45mm F2.8 ASPH. MEGA O.I.S. lens, which is slated to ship this October. Release notes for the Panasonic Lumix DMC-GH1 firmware v1.2 meanwhile note the same two changes, plus one further alteration. By reducing the speed of auto focusing using the LUMIX G 20mm F1.7 ASPH. lens during movie capture, the level of autofocus noise captured by the camera's microphone has also been reduced.

As with the previous release, both updates restrict the cameras to batteries containing a proprietary Panasonic identification chip. An interstitial warning page before the download can be reached advises customers that no third party has currently been licensed to produce batteries for either camera, and that hence all third party batteries will stop working once the firmware update is made. The company states that this decision has been made for safety reasons. Alongside the body updates, Panasonic has released firmware v1.1 for the Lumix G VARIO 45-200mm F4-5.6 ASPH. Mega O.I.S lens. This update impoves AF performance in Continuous AF or Movie modes. Note though that AF is not possible when using Full HD mode. Two final changes also apply to Movie modes other than the FHD mode - aperture operation noise is said to be reduced, and the stability of Panasonic's Mega Optical Image Stabilization function has been improved.

Further information on all the updates can be found on Panasonic's website.