67mm ND8 Neutral Density Multicoated Glass Filter for Canon EOS 40D - Perfect for Long Exposure Photography & Landscape Shooting

Neutral Density Filters Have Four Main Uses: 1.To enable slow shutter speeds to be used, especially with high speed films, to record movement in subjects such as waterfalls, clouds, or cars. 2. To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background. 3. To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situation. 4. To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure

TYPE Solid ND | RESISTANCE Scratch, Water, Oil | DENSITY 0.9 (3 Stops) | CONSTRUCTION Schott Glass | THICKNESS 0.25" (~ 6mm) | FOILS Steinmetz High Efficiency | COATING X Optical Nano (2 Layer) | TRANSMISSION (LIGHT) 99.2%

HIGH QUALITY GLASS Multi Green Coated - Double Layer Polish

Slim Design Minimizes Vignetting

Water Repelling, Oil Repelling, Scratch Resistant

10 Year Warranty