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Thread: Filter

  1. #1

    Default Filter

    Hi
    What is the effect of a MRC Neutral Density ND-4 filter & when should it be used?
    Tks

  2. #2
    Member
    Join Date
    Feb 2007
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    Woodlands
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    765

    Default Re: Filter

    A neutral density filter is just a darkening filter that absorbs all wavelength of light in a similar manner. So in the event that you want to use a slower shutter speed with a given aperture, and you are already at the lowest ISO, then you'd need a ND filter to absorb some light, so that you can use a slower shutter speed. An ND4 filter will increase the shutter speed by 4 times.

  3. #3

    Default Re: Filter

    Quote Originally Posted by cantaresg View Post
    A neutral density filter is just a darkening filter that absorbs all wavelength of light in a similar manner. So in the event that you want to use a slower shutter speed with a given aperture, and you are already at the lowest ISO, then you'd need a ND filter to absorb some light, so that you can use a slower shutter speed. An ND4 filter will increase the shutter speed by 4 times.
    Thanks a lot for the info.

  4. #4

    Default Re: Filter

    another use is to let you use a larger aperture in daylight when you've already hit the min shutter speed..

  5. #5

    Default Re: Filter

    Quote Originally Posted by cantaresg View Post
    A neutral density filter is just a darkening filter that absorbs all wavelength of light in a similar manner. So in the event that you want to use a slower shutter speed with a given aperture, and you are already at the lowest ISO, then you'd need a ND filter to absorb some light, so that you can use a slower shutter speed. An ND4 filter will increase the shutter speed by 4 times.
    to add on, other than using large aperture in broad day light - why you do this is because you want to limit DOF probably

    another use is to lengthen exposure purely instead of stopping down (i.e. using a larger f-stop) , stuff like capturing motion, people trails, light trails, and most commonly, flowing water

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