On my D800 I have noticed that in >f/14 pictures there is small smudge/dust visible. However, when I lift the mirror and open the shutter I can't see anything. Ii must be really small, but it's kind of difficult to do something about when I can't even see it.
Besides using an airblower I guess it's back to Nikon, but I am definitely open for suggestions?
Comments
http://forum.nikonrumors.com/discussion/664/d800e-and-oil-spots/p1