ND202B 50 mm x 50 mm; Unmounted Reflective ND Filter; Optical Density 0.2

The ND202B is a 50 mm x 50 mm unmounted reflective neutral density filter, boasting an optical density of 0.2. This filter is sourced from the renowned optical component manufacturer, Thorlabs. The ND202B is designed to reduce the intensity of incident light without altering its color composition, making it an ideal solution for various applications in photography, cinematography, and beam attenuation in laser systems.

The filter features a rectangular base shape, constructed from N-BK7 Schott glass, a material known for its excellent optical properties and durability. Its geometry includes a width of 50 mm, a height of 50 mm, and a thickness of 2 mm, ensuring compatibility with a wide range of optical systems.

The ND202B is coated with Thorlabs' proprietary THo ND02 coating on both the front and back surfaces. This coating enhances the filter's performance by minimizing reflection and improving transmission, thereby reducing the risk of unwanted artifacts such as ghosting and flare.

The filter's shape is classified as a thin lens, which refers to its minimal thickness relative to its diameter. This design not only contributes to the filter's overall lightweight nature but also minimizes optical aberrations, ensuring optimal image quality.

For users seeking a reliable and high-performance neutral density filter, the ND202B is an excellent choice. Its compatibility with various optical systems, coupled with its exceptional optical properties, makes it a versatile and valuable addition to any optical setup.