This is a 245-2525 Neutral Density Filter, sourced from the reputable vendor EKSMA Optics. The filter is designed with a circular shape, featuring a diameter of 25.4 mm and a thickness of 1.1 mm, making it a thin lens type.
The filter is made of UVFS MAL-1965 material, ensuring durability and high-quality performance. It is specifically designed for use with a wavelength of 550 nm. The front and back of the filter are coated with EKS 245-2525, providing optimal reflective properties.
The filter is currently in stock and available for purchase. For more detailed information, you can refer to the vendor's website at https://eksmaoptics.com/optical-components/optical-filters/neutral-density-reflective-type-filters-at-400-2000-nm/.