what mean ' coat' on the filter??


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Its a layer of chemical compounds to help intrease light transmission or to make the surface of the glass more reisitant to scratches/water and easier to clean.
 

raptor84 said:
Its a layer of chemical compounds to help intrease light transmission or to make the surface of the glass more reisitant to scratches/water and easier to clean.

thx for explain !! :D
 

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