I have been mainly shooting with my 50mm lens, but today for the first time in a while I was using my 18-55mm and my 70-300mm. On pictures from both I have noticed black spots in the upper half of the photo. Here's an example ... IMG_3831 by *Babs, on Flickr (Please, no C&C! I know it's not a great snap - it's just as an example of the spotting :mrgreen: ) Is this indicating that both lens need cleaning? Or is it something internal to the camera. Is it something I can deal with myself without damaging things? Or am I better to take it to a professional? Both the 18-55mm and the 70-300mm were second hand, while the 50mm (which I'm not seeing this on) was brand new about 3 months ago. Apologies if this is a ridiculously basic question - but I'm still learning!