The HOYA R72 infrared filter is specially designed for infrared photography with digital cameras and infrared film. Infrared light begins in the high-red range of the visible spectrum at around 750 nm and extends beyond 1000 nm. When looking through the R72 filter, it looks almost opaque, as the filter only lets through light from the very high red edge of the visible spectrum and infrared light. Due to the nature of infrared light, the filter factor and exposure compensation are very different from visible light and depend largely on the lighting conditions. The Hoya R72 works well with digital cameras, especially mirrorless cameras or DSLRS without an IR cut filter in front of the sensor. (Please check the user manual of your camera). The filter allows the light at 760 nm - 860 nm to pass through completely. (infrared spectrum) with a light transmission of 95%. The HOYA R72 is made from high quality Hoya optical glass mounted in a precision machined aluminum frame for rigidity. Can be combined with colored black and white contrast filters such as the R25 (red), K2 (yellow), O (orange) or other color filters to alter color rendition or contrast effects.
