The 54-728 is a Neutral Density Filter, specifically designed for use in optical systems where a reduction in light intensity is required. This filter, offered by Edmund Optics, is mounted with a diameter of 48 mm and a thickness of 5 mm. The filter's primary function is to absorb light evenly across the visible spectrum, from 400 to 700 nm, without introducing any color bias.
The filter's material ID is UVFS MAL-1965, and it features a thin lens shape. The front and back of the filter are coated with EDM 59-162, a coating that contributes to its absorptive properties. This filter is currently in stock and available for purchase through the Edmund Optics website, as indicated by its weblink status.