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

The AND-20S-20 is a high-quality Neutral Density Filter, offered by the renowned optical components manufacturer, OptoSigma. This filter is designed to reduce the intensity of light, without altering its color composition, making it an essential tool for various optical applications.

The filter is rectangular in shape, with dimensions of 20 x 20 mm, providing a versatile size that can be used in a wide range of optical setups. It is made from optical glass, ensuring high transmittance and clarity. The filter has a thickness of 2 mm, providing durability and stability in its mounting.

The AND-20S-20 features an Absorptive Neutral Density coating on both the front and back surfaces. This coating is designed to absorb a specific amount of light, reducing its intensity. The coating is optimized for the visible spectrum, with a central wavelength of 550 nm, ensuring effective light reduction across the visible light range (400-700 nm).

The coating is identified as 'opt and-20' in the item data, suggesting that it is a unique coating developed by OptoSigma. This specific coating ensures high uniformity and consistency, minimizing any potential for vignetting or inconsistencies in light reduction across the filter surface.

The filter is designed to be unmounted, providing users with the flexibility to integrate it into their existing optical systems using their preferred mounting solution. This feature also makes it a cost-effective solution, as it can be used in various setups without the need for multiple mounted filters.