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Thread: ND/UV Filter, how many stops less ?

  1. #1

    Default ND/UV Filter, how many stops less ?

    i understand that using a CPL will reduce 1-1.5 stops of light, but what about a ND or UV filter, which i intend to use as a lens protector.

  2. #2
    Senior Member yyD70S's Avatar
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    Default Re: ND/UV Filter, how many stops less ?

    Technically, CPL reduces by 1-2 stops depending on brands.

    UV = zero.

    ND filters... you purchase what you want. E.g., ND8 = 3 stops, etc.


    Quote Originally Posted by stupidlammer View Post
    i understand that using a CPL will reduce 1-1.5 stops of light, but what about a ND or UV filter, which i intend to use as a lens protector.

  3. #3
    Senior Member
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    Default Re: ND/UV Filter, how many stops less ?

    Quote Originally Posted by stupidlammer View Post
    i understand that using a CPL will reduce 1-1.5 stops of light, but what about a ND or UV filter, which i intend to use as a lens protector.
    Use UV as lens protector. I recommend B+W UV MRC filter . Its brass metal, construction, glass and MRC (Multi Resistant Coating) coating is very good.

    IIRC, UV filter does reduce light, but the amount is insignificant. Depending on brand, multi coating, single coating and no-coating. some very good coating like B+W MRC can transmit 99.7% light. While single coating may only transmit 97% of light.

    This may help:
    http://www.kenrockwell.com/tech/filters.htm

    Regards,
    Arto.

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