FNU2025 25 mm Dia. Metallic Neutral Density Filter 546nm

The FNU2025 is a 25 mm diameter Neutral Density Filter, sourced from Knight Optical, a reputable vendor known for its high-quality optical elements. This filter is designed to reduce the intensity of light without altering its color composition, making it an ideal choice for various applications in photography, cinematography, and scientific research.

The filter features a UV-grade material with the catalog number UVFS MAL-1965, ensuring durability and reliability. It is circular in shape, a common design that facilitates easy installation and alignment in optical systems. The filter's base shape is thin lens, which helps minimize optical aberrations and distortions.

The FNU2025 has a wavelength of 546nm, indicating its specific light absorption properties. This wavelength is often used in applications that require precise control over light intensity. The filter's geometry includes a diameter of 25mm and a thickness of 2mm, providing a balance between compactness and robustness.

The filter's front and back are coated with KNI FNU20, a coating that enhances the filter's performance and longevity. This coating helps reduce surface reflections, increasing transmission efficiency and improving the overall quality of the optical system.