63-461 25 mm Dia. Hoya ND-50 Absorptive Neutral Density (OD 0.2) Color Filter; t=1.5 mm 400-700nm

The 63-461 is a 25 mm diameter absorptive neutral density color filter, manufactured by Hoya and distributed by Edmund Optics. This filter is designed with a neutral density of 0.2 (ND-50), which reduces the light intensity without altering the color composition. It is ideal for applications that require a consistent and balanced light reduction, such as photography, cinematography, and beam attenuation.

The filter is made of UVFS glass, identified as Mal-1965, and has a thickness of 1.5 mm. This specific glass type is known for its excellent optical properties, making it suitable for a wide range of applications. The filter's geometry, including its 25 mm diameter, ensures compatibility with various optical systems.

The 63-461 filter features a thin lens shape, which minimizes optical aberrations and distortions. The front and back surfaces of the filter are coated with EDM 63-457, a coating that enhances the filter's performance and durability. This coating provides protection against environmental factors, such as dust and moisture, and ensures the filter's longevity.

The filter's spectral response covers the visible light range, from 400 to 700 nm. This broadband response makes it suitable for various applications that require light reduction within the visible spectrum. The filter's catalog number, 63-461, is a unique identifier that simplifies the ordering and inventory management process.