ND03B Dia. 25 mm Unmounted Reflective ND Filter; Optical Density 0.3

The ND03B is a circular Neutral Density (ND) filter, unmounted and with a diameter of 25 mm, sourced from the renowned optical component manufacturer, Thorlabs. This filter is designed to reduce the intensity of incident light without altering its color composition, making it an essential tool for various optical applications.

The filter features a front and back coating of THo ND03, a specialized coating that provides an Optical Density (OD) of 0.3. This specific OD value signifies that the filter reduces the light intensity by a factor of 2 (or 50%). It is particularly useful in situations where moderate light reduction is required, such as in high-exposure photography or laser applications.

The ND03B is crafted from N-BK7 Schott, a high-quality optical glass known for its excellent transmittance and low auto-fluorescence. The filter's geometry, including its 1 mm thickness, is designed to ensure minimal optical distortion and high compatibility with various optical systems.

This filter is currently in stock and available for immediate purchase through the provided Thorlabs web link. With its reliable performance and versatile applications, the ND03B is an excellent choice for those seeking a mid-range neutral density filter for their optical setup.