Hoya 46mm R-72 Infrared Filter
Hoya 46mm R-72 Infrared Filter
This 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. R72 passes only infrared rays above 720nm. It is often used in crime detection, medical photography, detection of distribution of vegetation, etc.
- used for photography with infrared films.
- also sensitive to ultraviolet rays
- It is often used in crime detection