The Hitech 150 x 170mm Cool Blue #3 Hard Graduated Filter is a hard-edged graduated color filter providing a steely blue color across the image, giving a cooling effect for your photographs. The graduated filter design keeps a portion of the image neutral, resulting in a more realistic look while allowing for the sky or other bright areas to take on the color of the density.

This filter measures 5.9 x 6.7" / 150 x 170mm and is constructed out of CR-39 dyed resin. The #3 filter is the densest of the series and provides a noitceable amount of cool blue coloration.