Description:Material: Night Filter made of Optical Glass, frame is Premium aluminum alloyPurpose: Optical Glass Filter for reducing appearance of light pollution in images or video that include the night sky, and to minimize illumination from artificial light sources

Function: The Night Filter can improve the results of nighttime images by absorbing the yellow light

By stopping the dominant wavelengths of light with the color of those lamps from being recorded, filter enhances visibility of astronomical objects

Glass Coating: Night Filter is constructed from optical glass for color fidelity, each glass surface includes multi coating of anti reflection coatings,3

15mm Frame: aluminum alloy frame ensures durability while allowing the Night Filter to remain lightweight

Specification:Material: aluminum alloy, optical glassPackage Includes:1 Night FilterNote:Please allow slightly errors due to manual measurement and different monitors