Key Features: Under the Haida M7 Drop-in Filter, M10 Drop-in Filter, M15 Magnetic Filter, 100mm and 150mm Square Filter and Round Filter For Infrared Photography Blocks visible light up to 720nm 50% of infrared 720nm can happen. K9 High Quality Optical Glass Construction Multilayer Surfaces Anti Water and Anti-Oil Coatings at a Glance: The Haida NanoPro Infrared Filter is designed to capture images. a motif reflects or transmits infrared light. Infrared light waves occupy the space in the electromagnetic spectrum behind visible light due to their longer wavelengths. Many surfaces and materials respond to or emit infrared light waves differently than the visible light waves, providing the potential for shooting subjects or object properties that are otherwise invisible to the human eye. Such images require an infrared sensitive medium, such as infrared film or a digital photo sensor, which can be more effective when used without frequently set up infrared blocking filters. Conventional light sources such as the sun, photographic strobe or incandescent lighting can be used to provide infrared lighting. However, since infrared films or digital photo sensors can be more sensitive to the relatively higher energy and visible light of the shorter wavelength, the effects of infrared light can otherwise be obscured. This Haida NanoPro Infrared Filter 720 makes it possible to capture images of how objects are illuminated by infrared light by blocking UV and visible light waves that reach less than 670nm from entering the lens. Instead, visible and infrared light is transmitted progressively at or above 670nm, with 50% infrared light at 720nm and up to 98-99% of infrared light at 950nm. Haida NanoPro IR 720 filters are made of high quality K9 optical glass and feature an anti-oil, anti-water coating to reduce surface reflections and provide increased contrast and clarity.