Here is Neill Prohaska maintaining a infrared camera used to take measurments of the forest canopy. I'm not going to go into the scientific detail, but rather explain the shot.
We were up 210 foot flux tower in the middle of the Tapajos rainforest. I decided to use a 16mm fisheye lens to capture the whole scene. I used a Qflash which was easy to carry up the tower and had the power to overpower the sun at that time of day, (bare bulb). It was an amazing place to be, with a incredible views, trees for hundreds of miles in every direction. I wanted to capture a moment which truly expresses the atmosphere of the work and place.