FNM00325 25 mm Dia. Metallic Neutral Density Filter 546nm

The FNM00325 is a 25 mm diameter Neutral Density Filter, sourced from the renowned optical component vendor, Knight Optical. This filter is designed to reduce the intensity of light, without altering its color, making it an ideal choice for various applications in photography, cinematography, and scientific research.

The filter is made from N-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties and durability. It has a circular shape, a standard in optical systems due to its ease of alignment and integration. The filter's geometry includes a diameter of 25 mm and a thickness of 2 mm, ensuring efficient light transmission while maintaining structural integrity.

The FNM00325 features a unique coating on both the front and back surfaces, denoted as 'kni fnm003'. This coating enhances the filter's performance by reducing surface reflections and increasing transmission, thereby improving the overall quality of the optical system.

The filter's Neutral Density characteristic is centered at a wavelength of 546nm. This means it is particularly effective at reducing the intensity of light in this specific wavelength range, making it suitable for applications where specific light wavelengths need to be managed.