Canon Community

When a large area of sky is in a photograph, I see what appear to be waterspots in the area, but the glass is clean.  Is this a sensor problem? It happened with my previous Canon DSLR as well. I use the 100-400L lens on a 60D. Thanks.

HelloI took several dozen photos with my 60D, showed a couple of them to my wife (on the camera screen) and then set the camera down.  Two hours later when I inserted the SanDisk Extreme 16GB card into my computer, none of the new shots was there.  O...