The 13-177 is a 25 mm diameter Neutral Density Filter, manufactured by Hoya and sourced from Edmund Optics. This filter is designed with a Sub Type of Neutral Density, which means it reduces the intensity of all wavelengths of light equally, providing a uniform attenuation without altering the color balance.
The filter is circular in shape, made from UVFS Mal- 1965 material, and has a thickness of 3 mm. It features a front and back coating of EDM 13-160, which enhances its durability and performance. The geometry of the filter is defined by its diameter and thickness, making it compatible with various optical systems.
The wavelength of this filter is 588 nm, which is in the near-infrared (NIR) region of the spectrum. This makes it suitable for applications that require the reduction of light intensity in the NIR range. The filter is currently in stock and available for purchase through the Edmund Optics website.