ND503B Dia. 0.5 in Unmounted Reflective ND Filter; Optical Density 0.3

The ND503B is a circular neutral density filter, unmounted and with a diameter of 0.5 inches, sourced from the reputable vendor Thorlabs. This filter is designed to reduce the intensity of incident light without altering its color composition, making it an ideal tool for various optical applications.

The filter's material is N-BK7 Schott, a high-grade borosilicate glass known for its excellent optical properties. It has a thickness of 1 millimeter, ensuring durability while maintaining minimal optical distortion. The ND503B boasts a wavelength of 633 nanometers, which is within the visible light spectrum.

The ND503B is coated with THo ND03 on both the front and back surfaces. This coating is a reflective neutral density type, designed to provide a uniform attenuation of light across the entire spectrum. The optical density of 0.3 indicates a reduction of 70% of the incident light, offering a versatile level of light control.

The filter's shape is that of a thin lens, which helps minimize optical aberrations and distortions. This feature, combined with its high-quality material and coating, makes the ND503B a reliable and efficient optical component for various applications.

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