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Message: <blockquote data-quote="voxmagna" data-source="post: 614434" data-attributes="member: 38477">Thanks Patrick. Yes I do that and I also use a sensor magnifier. It's when I removed some 'foreign bodies' from the sensor surface and looked under a microscope that I found I wasn't just looking at 'dust' but also black curly filament fibres which could only have come from the blackout lining inside the mirror box. Then the penny dropped.  You increase sensor resolution using a traditional dslr body and it becomes impossible to keep fine particles off the sensor to the extent you pick up your camera and can confidently shoot using all apertures without blemishes on pictures. It's worse when it comes from inside the camera body, because reducing lens swaps doesn't help. Mirror slaps each shot do what the Nikon sensor clean option tried to do in reverse - shake up particles and fibres then dump them on the sensor.I think present high sensor resolutions are now at the limit for open sensors unless dust ingress and careful use of materials used in camera construction is considered in future designs. DSLRs have always used sensor resolution as their USP but I think higher sensor resolutions will only be used in cameras with a sealed sensor and a glass or prism interface which can be more easily kept dust free. I've now got quite good at shooting sky at f22 and panning around in the preview zoom mode. But it doesn't solve the problem because you still have to remove a lens in an inconvenient place, remove the problem or move it somewhere else only for it to return.</blockquote>

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