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Schneider Optics 4 x 4" Neutral Density (ND) 1.5 Water White Glass Filter
Schneider Optics 4" x 4" Neutral Density Filter 1.5 is designed to control exposure or depth of field under various lighting conditions without affecting color or contrast.
They permit the use of high-speed film (i.e. Kodak 5298) in bright lighting conditions and diminish distracting backgrounds in a scene by permitting the use of wider apertures to reduce depth of field as required to throw the background out of focus while maintaining focus on the subject.
They allow you to control the amount of light reaching the film without relying solely on the lens aperture. Graduated Schneider ND filters enable you to evenly expose an unbalanced lighting situation. Unlike other brands, Schneider Absorptive ND filters are a neutral gray, achieved with laboratory precision.
Each filter is made of two pieces of Schneider's crystal-clear optical glass, which allows for the transmission of the absolute truest possible attenuated light. To prevent edge-chipping and delamination, these filters feature Schneider's unique Edge Seal.
Schneider ND filters are manufactured in a full range of densities (strengths), including the popular ND.3, ND.6, ND.9 and ND1.2, which provide exposure reductions of one, two, three and four stops, respectively.