MFND-25-80 25 mm Dia. Mounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm

The MFND-25-80 is a Neutral Density Filter, specifically designed for use in the visible light spectrum, with a wavelength of 550nm. This filter is manufactured by OptoSigma, a renowned vendor in the optical industry, and is available for purchase on their official website. The catalog number for this product is MFND-25-80.

This filter is mounted and features a circular design with a diameter of 25mm and a thickness of 2mm. The material used for the filter is N-BK7, a type of glass manufactured by Schott, which is known for its excellent optical properties.

The filter is coated with Opt FND-80 on both the front and back surfaces. This coating is designed to provide a high level of neutral density, which reduces the intensity of light without altering its color. This makes it an ideal choice for a wide range of applications, including photography, cinematography, and scientific research.

The geometry of the filter is that of a Thin Lens, which means it has a very small thickness relative to its diameter. This design helps to minimize optical aberrations and distortions, ensuring that the light passing through the filter remains clear and undistorted.