ND/UV Filter, how many stops less ?


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Oct 4, 2005
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#1
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.
 

yyD70S

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Dec 25, 2005
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#2
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.


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.
 

Artosoft

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Aug 31, 2005
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#3
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 :thumbsup: . 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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