I\'ve never had much of an issue with dust unless sky is included in shots over f/20 or so...I change glass (from 300 to 70-200) at Road Atlanta all the time...and that is not exactly a pristine enviroment...dust does exist...just a fact of life...but not a major issue for me...for some, maybe...
Jefferson
Aug 17, 2012 at 10:37 AM
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