Hoya RM72 Infrared filter is used for photography with infrared films.
Infrared 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
Hoya makes two types of infrared filters: R72 passes only infrared rays above 720nm; RM90 passes only that above 900nm
Type
Infrared
Size
52 mm
Grade
RM72
Filter Factor
Not specified
Multi-Coated
No
Rotating
No
Effect
Passes only infrared rays above 720nm
Application
Nature, scenics; Often used in crime detection, medical photography, detection of distribution of vegetation, etc.