Schneider 4x5.65" RHOdium Full Spectrum ND Graduated Filter, 0.9 Soft Edge

The first Full Spectrum Graduated Neutral Density Filter, which follows the natural gradient of the sky.
Graduated neutral density filters are used in photography to darken an overly-bright part of a scene, like a sky, and lighten the foreground. Even at high densities, RHOdium Full Spectrum ND filters from Schneider-Kreuznach reduce the amount of light in the entire visible spectrum and the near-infrared range so that there is no color cast in the image.

Schneider-Kreuznach RHOdium Full Spectrum Graduated NDs are designed so that the gray gradient of the filter follows the natural shading of the sky, allowing a more even exposure of the image. The ND coating is enclosed between two crystal-clear glasses, making it excellent protection against wear and the high stresses in the film business. The entire RHOdium Full Spectrum ND filter line (solid/ gradient) is color-matched and can be used in combination.