ND20B Dia. 25 mm Unmounted Reflective ND Filter; Optical Density 2.0

The ND20B is a circular Neutral Density Filter with a diameter of 25 mm and a thickness of 1 mm, sourced from the renowned optical component manufacturer, Thorlabs. This unmounted filter boasts a base shape of a thin lens and is made from the high-quality material N-BK7 Schott, ensuring durability and reliability.

The filter's primary function is to reduce light intensity without altering the color composition of the light source. It achieves this through a front and back coating of THo ND20, providing an optical density of 2.0. This specific optical density corresponds to a reduction of 100 times the incident light, making it suitable for high-intensity light applications.

The ND20B filter is currently in stock and available for purchase through the Thorlabs website, as indicated by its weblink status. For more detailed information or to explore similar products, users are encouraged to visit the provided weblink.