The Tiffen 3mm Streak 4 x 4" filter is a special effects filter designed to create a single light ray from a point light source. This filter features a single series of engraved lines spaced 3 mm apart, extending diagonally across the filter surface. When the filter is rotated, the orientation of the light ray can be adjusted to suit your composition or desired effect. The filter is made from clear optical quality glass to maintain image clarity and measures 4 x 4" / 101.6 x 101.6 mm. Features: - Engraved lines spaced 3 mm apart produce a single light ray from point light sources, strong highlights, reflective materials or metallic surfaces. - The filter can be rotated to adjust the orientation of the light ray. - Optical glass construction and clear filter substrate help maintain original image quality and do not affect overall colour or contrast. Specifications: - Type: Star/ray filter - Size: 4 x 4" / 101.6 x 101.6 mm - Filter Factor: 1x (0 stop) - Effect: Produces a single light ray from a light source or reflective surface - Construction: Optical glass