Ricoh Japan just released the new GXR firmware, version 1.29, on their Japan site, and the autofocus speed is now really, really fast. How do you upgrade to it? Read on.
How to Upgrade Ricoh GXR Firmware
Download the firmware and unzip it.
Put the firmware files (several files) onto an SD card and put the card into the camera.
Make sure the camera is off.
Press plus and playback buttons simultaneously for a few seconds until you see the LCD change.
Follow the prompts, OK-ing to install.
Don’t mess with the camera while it is updating.