Canon offers EOS 5D Mark III firmware v1.1.2
Apr 27, 2012 at 17:33:24 GMT
Canon has made the latest firmware (v1.1.2) for the EOS 5D Mark III available from its customer support websites. The update fixes a number of small bugs and adds compatibility with the GP-E2 GPS receiver. The file can be downloaded from your region's Canon support website.