FND-50C02-80 50 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm

OptoSigma's FND-50C02-80 is a high-quality Neutral Density Filter, designed for use in the visible light spectrum, specifically between 400-700nm. This unmounted filter boasts a circular shape with a generous 50mm diameter, making it a versatile choice for various optical applications.

The filter is constructed from N-BK7 Schott, a renowned optical glass known for its excellent transmittance and low auto-fluorescence. This material ensures high-fidelity light transmission, minimizing distortions and aberrations. The filter's thickness is a mere 2mm, contributing to its lightweight and compact design.

The FND-50C02-80 features a reflective coating, denoted as 'opt fnd-80', on both the front and back surfaces. This coating is specifically designed to provide a neutral density of 80%, or an optical density of 1.4. This feature is crucial for applications requiring controlled light intensity, such as in photography, laser applications, or scientific research.

The filter's thin lens shape further enhances its usability, reducing the risk of vignetting and ensuring a wider field of view. According to the vendor's information, this item is currently in stock, making it an immediately available option for your optical needs.