Canon EOS 1Ds Mark III / EOS 1D Mark III oil spot problem

Some Canon EOS-1D mark III and EOS-1Ds mark III owners reported years ago that there are oil spots problem with their newly bought cameras. Somehow Canon didn’t response to those complains until recently… Canon posted a news on their europe website…

eos 1d 1ds iii

eos 1d / 1ds mark iii

Free inspection and cleaning for oil spots on EOS-1D Mark III and EOS-1Ds Mark III
Canon has discovered that images taken by some EOS-1D Mark III and EOS-1Ds Mark III digital SLR cameras may exhibit ring-shaped spots and is now offering free inspections and cleaning to solve this phenomenon.

The phenomenon is that some of the images taken with some of the cameras may exhibit large ring-shaped spots. These ring-shaped spots are the images of oil lubricant on the surface of the low pass filter (LPF), which is located in front of the CMOS sensor.

eos 1d 1ds iii oil spot problem

EOS 1D / 1Ds mark III oil spot problem

A ring shaped oil spot (left) and a magnified version of the image on the left (right).
The oil is used inside the mirror box to lubricate some of the camera’s moving parts. If the oil is applied too liberally when the camera is manufactured, it can become scattered onto the surface of the LPF through normal camera operation.

eos 1d 1ds iii oil spot problem cause

cause of EOS 1D / 1Ds III oil spot problem

Enlarge imageThe image above shows the top of the mirror box when the main mirror is flipped up. The white spots in the red boxes are excess lubricant oil.

Canon asks that customers who are encountering this phenomenon, or who have noticed that oil is visible on the surface of the back side of the mirror, should please click here to complete an online registration form if you own an affected product and wish to arrange for an inspection and clean. To prevent oil from scattering, which may seriously affect images, Canon will offer free cleaning of the mirror box to affected customers to remove the excess oil.

Measures are being implemented to control the amount of lubricant applied during manufacture in order to reduce the occurrence of oil spots. However, because this lubricant is required to ensure proper operation of the camera’s precision mechanical parts, it is impossible to eliminate all instances of oil scattering. If you require CMOS sensor cleaning, please complete an online registration form if you own an affected product.

Canon offers its most sincere apologies to customers using these products who have been inconvenienced by this issue. Going forward, Canon will spare no effort in its quality management to make sure its customers can use its products with confidence. Canon hopes its efforts will earn your understanding.

Canon repair registration form:
The orginal news on Canon Europe website:

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Posted in Canon | No Comments » May 16th, 2009

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