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Part Number: 1110Brand: Hoya
Infrared (R72) Used for photography with infrared films. lnfrared film is also sensitive to ultraviolet rays and the shorter wavelengths of the visible spectrum, so it is necessary to filter out all but the infrared rays. The Hoya R72 passes only infrared rays above 720nm.. This filter is often used in crime detection, medical photography, detection of distribution of vegetation, etc. In ordinary photography with infrared film or infrared colour film, the Y(K2), O(G), R(25A) and other filters can also be used to change the contrast or colour effect.
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