-------------- Original message ---------------------- From: "Mark Erickson" <[EMAIL PROTECTED]> > I'm not sure how California Precision does dust control. I have had them > repair several lenses, including an A*20mm F4 macro and a DA 21 Ltd. In all > cases, the lenses came back clean inside and out. > > Is there something special about the DA* 16-50 that would require, say, a > class 100 clean room? >
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