The Thermal Afocal Lens delivers instant magnification to several Nivisys thermal products. Designed specifically for the Thermal Monocular, the magnifier features a rugged design that stands up to diverse applications and military specifications to deliver the highest performance. The lens is quickly attached and removed by precision cut threads insuring a tight fit, clean design and secure feel. The lens has proven to adapt to thermal devices other than the Nivisys brand, which makes it a good choice when considering a magnifier for other thermal systems.