NE205B 2 in x 2 in Absorptive ND Filter; Optical Density 0.5

The NE205B is a Neutral Density (ND) Filter, measuring 2 inches by 2 inches, manufactured by Thorlabs. This filter is designed to reduce the intensity of incident light without altering its color composition, making it an ideal choice for various applications in photography, cinematography, and optical research.

The filter features a coating of tho ne05a on both the front and back surfaces, which provides an optical density of 0.5 at a wavelength of 633 nanometers. This specific coating and density ensure a consistent and predictable reduction in light intensity, allowing for greater control over exposure settings and depth of field.

The NE205B boasts a rectangular base shape and a thin lens design, with a width of 50.8 millimeters, a height of 50.8 millimeters, and a thickness of 0.9 millimeters. This compact and lightweight design facilitates easy integration into various optical systems and setups.

The filter is made from n-bk7 schott, a high-quality optical glass known for its excellent transmittance, homogeneity, and resistance to thermal shock. This material ensures the filter's durability and longevity, making it a reliable choice for both amateur and professional users.

According to Thorlabs' website, the NE205B is currently in stock, and users can access more information and place orders through the provided weblink.