Olympus firmware updates are available via the Olympus Camera Updater. The Panasonic LEICA DG VARIO-ELMAR 100-400mm/F4.0-F6.3 ASPH./POWER O.I.S. firmware update procedure can be found here. Related posts: Olympus OM-D EM1 Mark 2 Firmware 1.3 and Olympus PEN-F Firmware 2.0 Released Panasonic GH-5 and G85 Firmware Updates Panasonic GH5, GH4 and Lens Firmware Updates Released