@gradient I don't know about the D70's but I think you rally make a big deal out of it. I have my Canon 10 D for two years now and had never really problems with dust ! I cleaned the sensor once but that was after a trip in the desert. Yes the camera should be clean whn you get it ;-). But than if you treat it carefully I don't see any problems. And I shoot in f5,6 but also often in f16 or f38 with long exsporure. I thinkl more important is to keep your lenses clean! But ok everybody has his own oppinion and for me I could never imagine going back to my old Leica, even if it's a fantastic film camera.