Canon EOS-1D C Firmware Version 1.3.5
Canon has posted a firmware update for its EOS-1D C digital SLR camera. Version 1.3.5 fixes a phenomenon in which the line-level audio input function of some EOS-1D C cameras does not operate as expected with Firmware Version 1.3.4. For the details, head to the website below.
Website: Canon Product Advisories