The new HALO-X50 is the latest addition to N-Vision’s groundbreaking line of premium thermal optics. BAE 12 micron 640×480, 60 Hz core. High Quality 50mm / F1.1 Germanium Lens. All N-Vision Optics thermal systems are proudly manufactured in the USA with the very best components and carry an industry-leading 5 year, transferable warranty.