This 67mm Tiffen Graduated ND Digital HT Filter is a graduated neutral density filter that helps to specifically darken skies and other bright areas of the image. The filter is densest at the edge and tapers to clear by the middle, with a feathered line between the density and clear areas. Neutral density filters do not affect the coloration of the image and the 0.6 optical density provides a 2 stop reduction in light from entering the lens. This filter also features a rotating filter ring for flexibility when placing the density over specific areas of the scene.
The Digital HT coating is a high transmission multicoating that surpasses military specifications for hardness and durability. This optical purity combined with high scratch-resistance results in an easy-to-clean filter with superb imaging quality. They also feature low-profile titanium filter rings for increased strength and vignetting reduction.