I managed to get my hands on a second Panasonic G85 with the original firmware on it (Thanks Suneel!). I knew I had a perfect opportunity to compare the IBIS improvements made by the new firmware and so I set to building a small rig. I mounted both cameras on my video tripod and took a series of pans, tilts and diagonal shots at both 12mm and 60mm on the 12-60mm kit lens that comes with the G85.