Rare Vintage FSI /FLIR Systems 50mm f/1.5 Infrared (IR) Thermal Lens Made in USA for Sale

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Rare Vintage FSI /FLIR Systems 50mm f/1.5 Infrared (IR) Thermal Lens Made in USA For Sale

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Rare Vintage FSI /FLIR Systems 50mm f/1.5 Infrared (IR) Thermal Lens Made in USA:
$472.50

Rare Vintage FSI / FLIR Systems 50mm f/1.5 Infrared (IR) Thermal LensMade in USA | Low Serial Number: 0303Up for sale is a highly specialized, vintage 50mm f/1.5 Infrared Thermal Imaging Lens manufactured under a legacy FSI / FLIR Systems industrial/defense contract. This is a rare, early production unit featuring a low sequential Serial Number: 0303 stamped directly onto the housing, with no other commercial part numbers or markings.This is an exotic optical instrument engineered for non-visible light spectrums, making it a valuable find for laboratory technicians, thermal imaging enthusiasts, DIY night-vision builders, or defense hardware collectors.

Key Features & Optical Specifications:Focal Length: 50mmAperture: Ultra-fast f/1.5 maximum aperture for high-speed thermal data capture.Opaque Infrared Optics: Features a striking, reflective golden-yellowish mirror finish on the front element. The optics are crafted from exotic infrared-transparent crystals (likely Zinc Selenide / ZnSe or Silicon), which appear completely opaque to the human eye but allow thermal heat waves to pass directly through to a sensor core.Heavy-Duty Construction: Premium "Made in USA" aerospace/industrial build quality with a ruggedized metal housing.Internal Cell Focusing: Turning the focus ring adjusts an internal optical element while the external metal barrel remains completely fixed in length. This design ensures maximum vibration resistance and maintains a pressurized environmental seal.

Mounting Style: Equipped with a threadless 3-tab flat industrial bayonet flange designed to fit into a quick-release clamping collar system or stabilized enclosure payload.

Condition:Cosmetic: Used vintage condition. The metal housing shows minor signs of standard handling/storage wear consistent with its age, but the lettering is sharp and clear.Optics: The golden-yellow front element coating is intact and retains its brilliant mirror finish. No major scratches or gouges observed. (Please study the macro photos closely for exact cosmetic details).

Mechanics: The focus ring rotates smoothly. The internal glass elements shift properly upon rotation while the outer chassis remains completely stable.

Testing: This is a standalone lens unit only (no camera body or sensor kit included). Because it requires a specialized SWIR/MWIR/LWIR thermal imaging core to process images, it has not been tested on a live sensor.

Sold As-Is / As-Described for parts, repair, custom integration, or collection.Shipping & Handling:Ships securely packed with heavy padding to ensure the delicate crystalline optics arrive safely.

Worldwide shipping is available via International Shipping.If you are looking for an exact, early-generation replacement lens for a legacy FLIR instrumentation kit or need a premium piece of USA-made thermal glass for a custom project, don't miss out on this low-serial-number unit. Buy it now or make an offer!