This morning I received not one, but two e-mails on the problem I experienced with my Canon 5D Mark II. Both Josh and Mike sent me links to different articles. My favorite article is on Canon’s website!
Images taken 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.
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 LPF through normal camera operation.
You can read the whole report on Canon’s site.
Personally, I’d like a refund on the shipping ($76) and the cleaning that the Canon Service center charged me ($51 and some change).
Seriously, mere days after my cleaning they come out with this. Somebody dropped the ball on my service at Canon. Let’s not forget that the brush on my Arctic Butterfly was also affected by getting the grease on it……
Wow, hot under the collar this morning with Canon’s service center!