About the camera you need not much to say, is class ... were it not for the sensor spots, have the camera bought used ... and cleaned immediately after a few professional pictures the first spots .... camera .. after a few hundred Photos again the same ... cleaning by Fachfirma..das went several times so ... and what you read on the internet all so adventurous about sensor cleaning, scared me, what do machen..was broken .... So I called in a company in Linz at the hat..dort a great reputation told me a gentleman of this company .... with the cleaning with a brush go 80% of the stains away, he told me exactly how to do that , was still skeptical because the brush is very expensive and you also need compressed air to charge the brush. Brush arrived compressed air (gas from the can) So lenses removed mirror foil folded away (without the cleaning mode the you need not) with bellows camera cleaned held downwards. Unpacked brush, charged with the compressed air .... twice easily swept over the sensor .. (thought that is now often take up the works) again cleaned with bellows. With Aperture 22 tested on a sheet white paper then made against the dark blue sky pictures ... no smallest speck more. What only to note is the brush must of course never be touched to the fine bristles when blowing off with compressed air from a can, you should just slightly push the dosing button of the can. The result, professional cleaning has brought little that woh by brush not stain when mehr..und which come 3 minutes and it's all done.