AND-25S-20 25 x 25 mm Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

The AND-25S-20 is a high-quality Neutral Density Filter, offered by the renowned optical components manufacturer, OptoSigma. This filter is designed for use in the visible light spectrum, specifically absorbing light within the 400-700nm range.

The filter is rectangular in shape, with dimensions of 25 x 25 mm, making it suitable for a wide range of optical applications. It boasts a thickness of 2 mm, providing excellent durability and stability. The filter is unmounted, offering users the flexibility to integrate it into their existing optical systems or mounts.

The AND-25S-20 features a coating on both the front and back surfaces, identified as 'opt and-20'. This coating enhances the filter's performance, ensuring accurate light absorption and maintaining the integrity of the optical system. The coating also aids in reducing unwanted reflections, further improving the quality of the transmitted light.

The filter is designed in a Thin Lens shape, which is beneficial for applications where minimal thickness is required. This feature also contributes to the filter's overall lightness, making it easy to handle and integrate into various optical setups.