NOTE : You will need a PC in order to carry out this Firmware update. LINK HERE   http://support.pro.sony.eu//software/detail.aspx?u=biz&id=BPE-SS-03H5&lang=E&model=HXR-NX5E

You can get the new firmware here : http://web.canon.jp/imaging/eosd/firm-e/eos5dmk2/firmware.html