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 May 17, 2009 - 08:20 GMT
Canon releases a service notice for the EOS-1D / 1Ds Mark III digital SLR cameras. It appears that images taken by some cameras may exhibit ring-shaped spots. The cause for these ring-shaped spots are the images of oil lubricant on the surface of the low pass filter which is located in front of the CMOS sensor. This 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 low pass filter...More
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