LEE Elements Variable Neutral Density Filter VND 6-9 stops 72mm pro glass Blue can be found here

Blue can be found here

Full technical specifications for 217 Blue Diffusion can be found here

Transmission Y (%) - 36

Full technical specifications for 789 Blood Red can be found here

This makes them more durable and easy to use

LEE Elements Variable Neutral Density Filter VND 6-9 stops 72mm pro glass Blue can be found hereDesigned for photographers and videographers alike, who insist on quality and performance, this new LEE Elements Variable ND Filter is available in convenient 72mm screw in form, allowing users to achieve 6 9 stops of precise ND adjustment without the need to pack and carry several different ND options. Fully adjustable to increase or decrease the amount of light entering the lens over a precise six to nine stop range, without affecting the image