Marumi 62mm Neutral Density x4 Multi Coated Filter has been discontinued, here are some related products you might like:
Neutral Density filters appear grey and reduce the amount of light reaching the film/light sensor. They have no effect on color balance. They are Multicoated to minimize reflection at the filter surfaces which reduces flare and ghosting.
ND filters have four main uses:
- To enable slow shutter speeds to be used, especially with high speed films, to record movement in subjects such as waterfalls, clouds, or cars.
- To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background.
- To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situations.
- To allow cine and video cameras(which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure.
ND filters come in many strengths or different levels of densities for fine tuning exposures as well as various rates of transition:
- ND2 reduces amount of light to 50%
- ND4 reduces amount of light to 25%
- ND8 reduces amount of light to 12.5%
in other words:
- ND-2 absorbs 1 F-stop of light.
- ND-4 absorbs 2 F-stops of light.
- ND-8 absorbs 3 F-stops of light.
More information on Marumi filters: (Link to Marumi International Website)