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.
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Comments about Hoya 46mm RM72 Infrared Glass Filter:
Given the sensitivity of the Leica M8 to infrared, the use of this filter works well to capture infrared images. In Lightroom (or any other raw editor), you simply convert the image to greyscale and adjust the magenta to suit your tastes. Try it.
Pros
Cons
Best Uses
Comments about Hoya 46mm RM72 Infrared Glass Filter:
Great IR filter. Used with Ilford SFX 200 and got some really good results. It was, unfortunately, cloudy (and has been), but even with the clouds blocking some IR light, the image still retained the great IR looks.
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