Canon has released firmware upgrades for three of its professional EOS models Firmware version 1.1.4 for the EOS-1D Mark IV Firmware version 1.3.2 for the EOS-1D Mark III Firmware version 1.2.3 for the EOS-1Ds Mark III incorporate the same two fixes: • Resolves the following phenomenon: when the camera is not attached to a lens, power consumption may be higher than usual, causing premature battery drain. • Resolves a phenomenon in which 'Err 02' ('Err 70' on the EOS-1D Mark III and 1Ds Mark III) may be displayed when the shutter is released without a lens attached. You can download the firmware upgrades by following the camera links from one of these pages: Canon UK Canon USA
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