My clean 30D sensor got dirty rather quickly in Yosemite Valley. I had on my 17-40L but was wanting to use the EF-S 10-22 for some extra wide stuff and while trying to be cautious in the dry windy conditions it was inevitable the dirt came in. So bad I could see it in the LCD even at f/8 > 
... thought about giving it a Rocket blow but realized it probably wouild just make it worse so just let it go for Clone Stamping later.
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I was able to blow this speck out later at the Lodge but as the week progressed more made its way in. Darn shame the Eclipse solution can't be taken on planes. After three good Copperhill swipes at home, its clean once again ready for the next trek.
