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B W 67mm 092 Dark Red Infrared SH Filter



The nearly opaque B W Infrared Filter 092 - which looks dark purplish red when held in front of a li
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B W 67mm 092 Dark Red Infrared SH Filter
The nearly opaque B W Infrared Filter 092 - which looks dark purplish red when held in front of a light source - blocks visible light up to 650 nm, and passes only 50 of the radiation just below 700 nm (thus the dark red colour). From 730 nm to 2000 nm, transmission is greater than 90. This makes photographs of pure red and infrared images possible with the best utilisation of the relatively low sensitivity of infrared films. As the sensitisation of infrared black-and-white films barely extend

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