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Thread: Diff between Linear & circular polariser

  1. #21
    Senior Member
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    Default Re: Diff between Linear & circular polariser

    Quote Originally Posted by tomlowct
    then what's the difference between double and multi coated?
    Maybe you mean Double side coated filter and multi coated filter? There is also a single layer coated filter (or called coated filter only).

    AFAIK, Double side coated filter meaning front and rear of filter is coated (single or multi coated).

    Multi coated filter meaning the layer of coating is more than 1. Some multi coated filter have 7 layers of coating or more. Usually if multi coated it is also double side coating.

    Regards,
    Arto.

  2. #22

    Default Re: Diff between Linear & circular polariser

    I see. So can I say that the more layer coated the better effect I can get?

  3. #23
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    Default Re: Diff between Linear & circular polariser

    Quote Originally Posted by tomlowct
    I see. So can I say that the more layer coated the better effect I can get?
    Better effect... ?

    Coated or Multi coated function (in any filter(s), UV, SKYLIGHT, CPL, ND, etc.) is to reduce reflection of the filter(s), thus transmit all the light as much as possible.

    For examples (examples only, do not take it as a correct value):
    - Non coated UV filter will transmit 90% of light, reflect 10% of light.
    - Single coated UV filter will transmit 99% of light, reflect 1% of light.
    - Multi coated UV filter will transmit 99.9% of light, reflect 0.1% of light.

    Which one is better, obviously the Multi Coated one.

    Regards,
    Arto.

  4. #24

    Default Re: Diff between Linear & circular polariser

    ok

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