The filter response is similar to that of a Wratten 89B or Hoya R72 though a little higher, it is 50% transmissive at 780nm and 90% from 810 to 1350nm only dropping below 70% again above 1600nm. Suitable for Cokin 'A' filter holders, this sale is for the filter only, no case, holder or pouch is supplied.
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These are new Genuine Hoya 58mm R72 Infrared filters. lnfrared 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.
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Zwecks Erhöhung von Farbkontrasten wird Infrarot-Film oder Infrarot-Farbfilm in Kombination mit Filtern gebraucht, wie Gelb (K2), Orange (G) und Rot (25A). HOYA Infrarot-Filter dienen dazu, sichtbares Licht weitgehend oder gänzlich auszufiltern bzw.
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Hoya 62mm R72 Pro Infrared Filter. Infrared light starts in the high-red area of the visible spectrum at around 750nm and goes up beyond 1000nm. This light is not visible to the naked eye. Looking through the R72 filter it looks almost opaque because the filter is only passing light from the very high red edge of the visible spectrum and infrared light.
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Hoya 67mm R72 Pro Infrared Filter. Infrared light starts in the high-red area of the visible spectrum at around 750nm and goes up beyond 1000nm. This light is not visible to the naked eye. Looking through the R72 filter it looks almost opaque because the filter is only passing light from the very high red edge of the visible spectrum and infrared light.
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Hoya 55mm R72 Pro Infrared Filter. Infrared light starts in the high-red area of the visible spectrum at around 750nm and goes up beyond 1000nm. This light is not visible to the naked eye. Looking through the R72 filter it looks almost opaque because the filter is only passing light from the very high red edge of the visible spectrum and infrared light.
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Hoya 58mm R72 Pro Infrared Filter. Infrared light starts in the high-red area of the visible spectrum at around 750nm and goes up beyond 1000nm. This light is not visible to the naked eye. Looking through the R72 filter it looks almost opaque because the filter is only passing light from the very high red edge of the visible spectrum and infrared light.
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Hoya 77mm R72 Pro Infrared Filter. Infrared light starts in the high-red area of the visible spectrum at around 750nm and goes up beyond 1000nm. This light is not visible to the naked eye. Looking through the R72 filter it looks almost opaque because the filter is only passing light from the very high red edge of the visible spectrum and infrared light.
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