My nikon refurbished d7000 all of a sudden began to show dark spots on the photos (several) and when I took it in to a professional he said there appeared to be some kind of an oily substance on the sensor itself and I'm afraid it may be ruined. I have never sprayed anything into the camera except for the rocket-shaped air pump. Has anyone else encountered this problem?
#4. "RE: D7000 image sensor foreign matter" In response to Reply # 3
>If is one time issue, give it to somebody to clean. If is a >recurring problem, then consider learning how to clean it >yourself.
If it recurs then send it back to Nikon. They will fix it under warranty and likely even a bit after as it is a known issue of their making - an oil seal on the mirror drive. I had mine fixed and that was the end of the issue.