Eliminates reflection from nonmetallic surfaces such as water, glass, etc. Also increase contrast and colour saturation. Recommended for TTL & AF cameras and video camcoder.
The Hoya Variable Neutral Density Filter provides a way to maintain exposure control by varying the amount of light entering the camera by 1.5 to 9 stops (0.45 to 2.7 density for cinematic use). The precision built-in double ring design allows the outer ring to rotate to control the amount of neutral density effect anywhere within the 1.5 – 9 stop range. This double-ring design is thin to reduce the likelihood of vignetting with wide-angle lenses.
The HOYA Variable Neutral Density filter can be used in place of several graded Neutral Density filters.
The Variable Neutral Density filter is helpful when: