13-249 25 mm Dia. Hoya ND-0.3 Absorptive Neutral Density Filter; OD 3 750-1550nm

The 13-249 is a 25 mm diameter Neutral Density Filter, specifically designed for use in the near-infrared spectrum, ranging from 750 to 1550nm. This filter is sourced from the reputable optical vendor, Edmund Optics, and boasts a catalog number of 13-249.

The filter is of the Absorptive Neutral Density type, which means it reduces the intensity of all wavelengths of light equally, resulting in a neutral color balance. The ND value of this filter is 0.3, which translates to a 43% transmission of light. This makes it ideal for applications where a significant reduction in light intensity is required without altering the color balance.

The filter is constructed with a Thin Lens shape, featuring a thickness of 3mm. This design ensures minimal distortion and maintains the integrity of the optical path. The filter's geometry is circular, with a diameter of 25mm, making it compatible with a wide range of optical systems.

The 13-249 filter is coated with EDM 13-232 on both the front and back surfaces. This coating enhances the filter's performance in the near-infrared spectrum, providing superior absorption and maintaining the filter's neutral color balance.

This filter is currently in stock and can be purchased directly from the Edmund Optics website via the provided weblink. With its robust design, specific wavelength range, and high-quality coating, the 13-249 is an excellent choice for any application requiring a Neutral Density Filter in the near-infrared spectrum.