The graduated nd 10 balances exposure between the lightest and darkest areas of a scene allowing better tone and detail to be recorded in these areas of the image the hoya graduated nd 10 is darker at the top giving that area a 3 stop light reduction and then fading evenly to a 1 stop light reduction at the bottom this creates more balanced exposure between the lighter and darker areas of a scene especially useful for photos that include the sky the aluminium filter frame rotates so t