Adjustable Neutral Density For ND400 Slim Fader For Camera 77 Mm With Neutral Density : Neutral: also known neutral used, used to filter light This filtering is non-selective, and the Neutral Density property to juxtapose light of different wavelengths is equation and equality Adjustable Neutral Density: Rotating view between -400 makes versatility in changing light Reduces the amount of light without affecting operation : Allows you to use travel time on high-speed videos or cameras that allow you to record movement/blurring of images in waterfalls, clouds or fast-moving objects Function: Eliminates too and faded vision of motion recording objects such as waterfalls, with long inflow door, Australian source of proper flow Material: neutral design made of optical configuration durable aluminum aviation frame - Inner mesh panties Type: improving neutral power/neutral power; Shape: Round model: whether ND400 302mm Material: aluminum aviation frame; Lens Material: Optical Glass (1) neutral arrangement 2: can determine the aperture coefficient of 50% of the amount of light; (2) Neutral classification 4: can determine 2 degrees of aperture and 75% of the amount of light; (3) neutral classification 8: maybe 3 degrees aperture and 87,5% light quantity; (4) Neutral Density 400: can calculate the amount of light with 9 degree aperture, equivalent to the specific exposure during the day and photographing the sun. contains: 1 . neutral power 1 box