When the EOS 5D Mark III Digital SLR Camera is used with the EF 200mm f/2L IS USM and some units of the EF 800mm f/5.6L IS USM lenses, with the Image Stabilizer switch on the lenses set to 'on', an abnormal noise may occur. This noise does not affect captured images.
Canon is investigating the cause and examining countermeasures to correct this phenomenon.
Canon is investigating the cause and examining countermeasures to correct this phenomenon.