Posts tagged ‘850 nm filter for infrared’
On hi-radiation days we use to meet here on the pier, if the black tide did not cover everything.
The older ones prefer to hide in the black shadows of the wide reflecting trees.
We know that one day we will go back where we belong to. When we will understand the meaning of this mechanical giant, we will finally go home.
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Enjoy full size view by clicking on each panorama.
Slightly more than half of the energy from the Sun arrives on Earth in the form of infrared radiation. Water absorbs the infra-red radiation, that explains the black lake and forests under the clouds.
The different pigments in plants reflect, transmit, and absorb different portions of the near-infrared radiation that we cannot see. Some plants can reflect more than others.
The clouds absorb visible and invisible radiation from the sun and re-emit much of the energy as infrared back to the atmosphere. Enjoy the reflecting trees and clouds: can you find the snow reflecting infra-red in the background?
Some time ago I doubted IR shooting could work on D800, having tested my single (!) wavelength filters. Just to be sure, I got a cheap 850 nm filter and tested it on my D800 today: and it worked!
The reason being, every wavelength above 850 nm goes through this filter, while single wavelengths in the IR spectrum are too weak to be detected.
Pictures can be converted to black and white only, no blue skies, due to complete absence of red green and blue. Here below the procedure how to work with pure infrared pictures on D800: