13-120 50 mm Dia. Hoya ND-13 Absorptive Neutral Density Filter; OD 0.9 425-675nm

The 13-120 is a 50 mm diameter Neutral Density Filter, manufactured by Hoya and sourced from Edmund Optics. This filter is designed for use in the visible spectrum, specifically between 425-675nm, making it suitable for a wide range of optical applications.

The filter features an Optical Density (OD) of 0.9, which corresponds to a transmission of approximately 35.5%. This makes it ideal for reducing light intensity without altering the color balance of the incident light. The absorptive nature of the filter ensures that it does not introduce any additional phase shift, which can be crucial in interferometric applications.

The filter is constructed with a Thin Lens shape, which helps to minimize optical aberrations. It has a thickness of 2.5mm, providing sufficient mechanical strength while maintaining a low profile. The front and back surfaces of the filter are coated with the EDM 13-086 coating, which enhances the filter's durability and resistance to environmental factors.

This filter is part of the UVFS MAL-1965 material family, which is known for its high optical quality and versatility. The catalog number for this item is 13-120, and it is currently in stock. For more information, please refer to the provided weblink.