ND2R04A Dia. 50 mm Reflective ND Filter; SM2-Threaded Mount; Optical Density 0.4

The ND2R04A is a Neutral Density Filter with a diameter of 50 mm, manufactured by Thorlabs. This filter is designed to reduce the intensity of incident light without altering its color composition, making it an ideal tool for various optical applications. The filter features a uniform optical density of 0.4, which translates to a reduction of 1.3 stops in light intensity.

The ND2R04A is constructed from N-BK7 Schott glass, a material known for its excellent optical properties and durability. The filter's geometry includes a thickness of 2 mm, contributing to its robustness and stability. The front and back surfaces of the filter are coated with THo ND04, a specialized coating that enhances the filter's performance and longevity.

This filter is designed with a Thin Lens shape, which is characterized by a flatter profile compared to traditional lens shapes. This design feature reduces the risk of vignetting and ensures a wider field of view. The filter is also equipped with an SM2-threaded mount, providing a secure and stable connection to other optical components.

The ND2R04A is currently in stock and available for purchase through the vendor's website. For more information, please refer to the provided weblink.