Neutral density filter reduces the amount of light going into the lens, so you can take long exposures even when the light is bright.
Long exposures blur anything moving, like water, clouds, or people. This can be very useful for making choppy water look smooth, making clouds streak, or getting rid of people at a tourist attraction.
These types of filters usually cost up to 2000 (especially on big diameter lenses), but with this simple hack, you can make it for only 250.
Read here how you can use it to your benifit
Item include :-1X 4"x3" Welding glass piece
good quality Clean and clear
Product serves the purpose - But green Tint review by Ajay on 12/28/2015
Good quality glass, but with green tint. I tried to adjust white balance and there is certain amt of color cast..so better to convert image to black and white.
Blocks good amount of light. so in mid day you can do long exposures. like clouds etc.,
serves the purpose.
Will do the video soon.