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RS35F1.1-384-17V2
Rising
The FL 35mm F1.1 LWIR Thermal Sight Lens is a compact, high-transmission infrared optic designed for 384×288–17μm detectors. Operating in the 8–12μm band with >88% average transmission and a fast F/1.1 aperture, it delivers bright, clear thermal imagery even in low-contrast environments. The lens offers a 10.6°×8° field of view, manual focus from 1m to infinity, and a lightweight 156g body with a 62mm outer diameter, making it ideal for portable thermal sights and handheld surveillance systems.
Engineered for rugged field use, this lens operates reliably from –40°C to +80°C and features a flange mount with precise back focal distances (7.74mm BFD, 13.5mm BWD, 15.98mm BFL). An optional DLC coating is available to enhance surface hardness and abrasion resistance, ensuring long-term durability in harsh environments without compromising optical performance.
Focal Length | 35mm |
F# | 1.1 |
Detector | 384x288-17um |
Average Transmission | >88% |
Wavelength | 8-12um |
Circular FOV | (H)10.6°x(V)8°x(D)13.2° |
Back Focus Distance | 7.74mm |
Back Working Distance | 13.5mm |
Back Focus Length | 15.98mm |
Dimensions | 62mm / 56.56mm |
Focus Type | Manual Focus |
Focus Range | 1m to infinity |
Mount Type | Flange |
Weight | 156g |
Operating Temperature | -40ºC to +80ºC |
Storage Temperature | -40ºC to +80ºC |
External Coating | DLC |
