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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. | |
R72 passes only infrared rays above 720nm RM90 passes only that above 900nm. | |
Often used in crime detection, medical photography, detection of distribution of vegetation, etc. | |
In ordinary photography with infrared film or infrared color film, the Y(K2), O(G), R(25A) and other filters can also be used to change the contrast or color effect. |
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