FND-30C02-20 30 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm

OptoSigma's FND-30C02-20 is a high-quality Neutral Density Filter, designed for use in the visible light spectrum, specifically between 400 and 700 nanometers. This filter is unmounted, offering flexibility for integration into various optical systems, and has a diameter of 30 millimeters and a thickness of 2 millimeters.

The filter is made from N-BK7, a type of borosilicate glass manufactured by Schott AG, known for its excellent optical properties and durability. This material is particularly suitable for applications that require high homogeneity and low auto-fluorescence.

The filter's coating is another notable feature. Both the front and back surfaces are coated with Opt FND-20, a reflective neutral density coating. This coating reduces the amount of light transmitted without altering the color balance, making it ideal for applications that require light reduction without color distortion.

The FND-30C02-20 is currently in stock and available for immediate purchase through the OptoSigma website. With its robust design, versatile applications, and high-quality construction, this filter is an excellent choice for a wide range of optical systems and setups.