13-266 50 mm Dia. Hoya ND-0.3 Absorptive Neutral Density Filter; OD 3 750-1550nm

The 13-266 is a 50 mm diameter Neutral Density Filter, manufactured by Hoya and sourced from Edmund Optics. This filter is designed for use in the near-infrared spectrum, specifically between 750nm and 1550nm, making it ideal for applications in this range.

The filter boasts a Sub Type of Neutral Density, which means it reduces the intensity of all wavelengths of light equally, providing a uniform attenuation. This is particularly useful in applications where a constant light level is required, such as in photography or cinematography.

The filter is circular in shape, a common form factor for optical components due to its ease of use and compatibility with various systems. It has a thickness of 3mm, which contributes to its durability and resistance to damage from external forces.

The 13-266 filter features a coating on both the front and back surfaces, identified as 'edm 13-232'. This coating is likely designed to enhance the filter's performance, such as by reducing reflections or increasing transmission. However, the specifics of this coating are not provided in the item data.

The filter's geometry is defined by its diameter and thickness. With a diameter of 50mm, it is suitable for use in a wide range of applications. The thickness of 3mm provides structural integrity and resistance to deformation.

The filter is classified as a Thin Lens, indicating that it has a low optical power and thin lens element. This is beneficial in applications where minimal distortion and high clarity are required.