53 Mourinho

The first step is to use a camel hair blower brush to remove any loose dirt, grit, etc. from the glass.
Then use a cotton swab, Kimwipe, or WHITE KLEENEX brand (no additives) moistened with a name brand lens cleaning solution or original Windex. Never wipe the filter with a dry "wipe", and NEVER pour the solution on the filter itself.
Use a gentle circular motion and work from the center of the filter to the ring and lift off in an upward motion against the ring.

NOTE:
The above is fine for B+W single-coated and MRC-designated filters. If your B+W filter has multi-coating of the older type (non MRC), it would be best if the filter were handled by a Schneider technician.

IMPORTANT : When cleaning your optical devices, always follow the manufacturer's directions.


출처 : http://www.schneideroptics.com/info/faq/bw.htm#qu17

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