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Unless you have large lumps of mud splattered on your sunfilter or corrector they shouldn't show up. They are too far down the imaging train. Big clods on the corrector and filter should only reduce the contrast. Can you see the secondary mirror (a rather large dust bunny really) on you images? No, and it's only half as far as the corrector plate. It's the stuff from the chip to the first few inches you really have to worry about.
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