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May 8, 2006
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#1
Hi
What is the effect of a MRC Neutral Density ND-4 filter & when should it be used?
Tks
 

cantaresg

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Feb 23, 2007
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#2
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.
 

May 8, 2006
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#3
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.
 

J-Chan

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Sep 21, 2005
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#4
another use is to let you use a larger aperture in daylight when you've already hit the min shutter speed..
 

night86mare

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Aug 25, 2006
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#5
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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