Average Reviews:
(More customer reviews)Ordered this 77 mm RM-72 filter (cutoff below 720 nm) to allow me to do digital IR photography without converting my DSLR camera. Most of my lenses have a 77 mm filter diameter, and smaller lens diameters can be easily used with this filter by adding a step-up ring. I recommend using this Hoya filter with an older DSLR camera which has a less rigid hot mirror filter cutting off IR wavelengths in front of the sensor. Necessary exposure times with the filter attached range between 5-20 seconds. The filter is well built and has a good screw-in thread. Highly recommended!
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Used for photography with infrared films. 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.
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