I went out shooting tonight, nothing special, I was just bored. I download the photos from my camera and noticed some spots on my pictures. My lens is clean (from what I can see), so it's likely that the dust or whatever is on the image sensor itself You can take a look at what I'm talking about here: http://picasaweb.google.com/mikejrisi/D50Spots How much is it to get this cleaned? How could this have happened? I have only taken the lens off a few times to switch lenses.