I had some single wavelength filters to test today on my D800. I read around infrared photography is still possible with D800, although all modern DSLR cameras do have UV and IR filters mounted in front of the sensor. See by yourself in the post picture: in the infrared area (above 710 nm) I do not see what I expected, i.e. white leaves due to reflected infrared light. Do you have any suggestion? Exposure times until 20 secs, ISO up to 1400, lens 50 mm f/1.4G. Did you test IR on D800 by yourself? Click below for a panel with the full pictures, sky inclusive.