Canon has released a service notice for its EOS-1D Mark III and EOS-1Ds Mark III DSLRs. It addresses the issue of ring-shaped spots appearing in the images of some cameras - caused by lubricant from the mirror box getting onto the Low Pass Filter. Owners of affected cameras can contact Canon's customer support centre for for a free cleaning of the mirror box.

Click here to read the service notice (Canon USA site)

Click here to read the service notice (Canon UK site)