Flip HD + Hoya R72 filter = near infrared camera
3,188 views · Published 9 March 2011 · 1:10 · Indexed 6 October 2026
Channel: bombaykaizoku · 2011 · Film & Animation
The visible spectrum is light with wavelengths between 400-700nm. An R72 filter blocks all light with wavelengths less then 720nm. Most images sensors in digital cameras are sensitive to light past 700nm in order to make a digital image look like what you see with your eye camera manufactures place a little piece of glass in the camera that blocks most of this light. Cheaper camera, however, do block as well. By placing an R72 filter over a Flip video camera we are able to see only light above 720nm that the camera is picking up. Vegetation reflects very well at these wavelengths while the sky and pavement do not giving cool effects such as a black sky or snow white trees. And the best part is you only need the smallest filter to cover the Flip camera lens! I bought mine for around $30 R72 Spec: http://www.hoyaoptics.com/pdf/R72.pdf
