Canon has today posted firmware version 1.0.3 for the EOS-1D Mark II digital SLR. The firmware adds new functions for communicating with Speedlite 580EX, reduces noise when shooting bulb exposures and fixes sensor cleaning operation.

Click here to download EOS-1D Mark II firmware

Release notes:

EOS-1D Mark II Firmware Update Version 1.0.3

What's new?

This firmware update fixes/improves the following:

• Added new functions for communicating with the Speedlite 580EX

• Reduced noise when shooting bulb exposures

• Fixed sensor-cleaning operations

This firmware supports cameras with firmware Version 1.0.1 or 1.0.2. If the camera already has the Version 1.0.3 firmware, this update is unnecessary.