The Sion C Graduated Neutral Density Filter from Vu Filters is a 75 x 100mm glass filter with a 3-stop maximum density, which transitions through a soft edge to a clear filter that does not impact image density. The filter is useful for darkening the sky to bring out more details when shooting over an uneven horizon, like a forest or uneven rooftops. The soft edge is also suitable for use with wide-angle lenses.
Schott Optical Glass Construction
The optical glass is ground and polished for high-performance light transmission without image degradation
Multi-Coated Surfaces
Both surfaces of the filter feature multi-coating to reduce glare, increasing light transmission and color saturation
Flat Wave Overcoat
Optic coating gives the filter's front surface protection from residue, making it easier to clean
