Cheap Opteka HD² 52mm R72 720nm Infrared X-Ray IR Filter

Opteka HD² 52mm R72 720nm Infrared X-Ray IR Filter by Opteka

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This filter can help you to see perfectly through sunglasses and dark, tinted car windows.
IR filters used in conjunction with an IR sensitive camera can sometimes see things completely invisible to the human eye.
Other applications where the IR filter can be used include: environmental studies, natural resource studies, monitoring geographical and geological changes, investigating coastal erosion and identifying marsh land vegetation, archaeological exploration, surface mining and mined land disturbances, hydrological studies and channel mapping, monitoring oil spills, irrigation studies, medicine, mineralogy, philately, art history, entomology, etc.
What are you waiting for? This filter will give you hours of photographic fun!