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wkong

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

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.
 

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.
 

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

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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