Specification::
Nano coatings on both sides of filter.
Digital water proof and scratch resistant multi-coating greatly reduces the appearance of lens flare and ghosting caused by reflections.
Ultra thin filter frame (Slim type filter only) to help avoid vignette on super wide angle lenses are also designed to hold a lens cap
Filters still retain front threads for a lens cap, a lens hood or even stacking a second filter

Description: 
Neutral Density filter evenly reduce the amount of light passing through the lens without effecting color. Ideal for reducing bright light in large aperture situations when a narrow depth is field is needed. Neutral Density Filters are often used to achieve motion blur effects with slow shutter speeds

ND filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.
Neutral Density filters do not affect the overall coloration of the image.
 
Features: 
High Quality Optical Glass 20 stop Neutral Density Filter ND 6.0
Increases control of depth of field
Eliminates overly bright, washed-out images. Balances exposures
Equally effective in color or black and white photography.