13-117 50 mm Dia. Hoya ND-25 Absorptive Neutral Density Filter; OD 0.5 425-675nm

The 13-117 is a 50 mm diameter Neutral Density Filter, manufactured by Hoya, and available through Edmund Optics. This filter is designed with a base shape of a Circular Thin Lens, featuring a thickness of 2 mm, making it an ideal choice for applications requiring minimal added weight or volume.

The filter's primary function is to reduce the intensity of light entering the optical path without altering the color composition. This is achieved through the use of an Absorptive Neutral Density coating, with an Optical Density (OD) of 0.5, specifically designed to operate within the wavelength range of 425-675 nm. This makes the filter suitable for applications where moderate light reduction is required, such as in photography or beam attenuation in laser systems.

The filter's material ID is UVFS MAL-1965, and it comes with identical coatings on both the front and back surfaces, denoted as EDM 13-083. This dual-sided coating ensures consistent performance, irrespective of the direction of light incidence.

The filter's vendor, Edmund Optics, provides a valid weblink, indicating that the item is currently in stock. For more detailed information or to make a purchase, users can visit the provided weblink: https://www.edmundoptics.com/p/05-od-50mm-dia-vis-0-coated-absorptive-nd-filter/44383/