13-088 12.5 mm Dia. Hoya ND-0.3 Absorptive Neutral Density Filter; OD 1.3 425-675nm

The 13-088 is a Neutral Density Filter, a type of optical component designed to reduce the intensity of light without altering its color composition. This particular model, sourced from Edmund Optics, boasts a 12.5 mm diameter and a thickness of 1.45 mm, making it a compact yet effective solution for various optical applications.

The filter's primary function is to decrease the amount of light passing through it, which is quantified by its Optical Density (OD). With an OD of 1.3, this filter can absorb 42.5% of the incident light, offering a significant reduction in intensity. This feature is particularly useful in high-intensity lighting scenarios, where controlling light levels is crucial.

The filter's coating, denoted as 'edm 13-088' on both the front and back surfaces, plays a vital role in its performance. This coating enhances the filter's absorptive properties, ensuring accurate and consistent light reduction across the visible spectrum (425-675nm). This broad wavelength range makes the filter versatile, suitable for a wide array of applications.

The filter's geometry and shape also contribute to its performance. Its thin lens design allows for easy integration into optical systems, while its circular shape ensures uniform light reduction regardless of the incident angle. This combination of features makes the 13-088 an excellent choice for users seeking a reliable and efficient Neutral Density Filter.