Gamma Curves are a relatively simple idea, enabling a more pleasing and detailed image to be captured and displayed. Getting your head around the concept can be difficult for some though. Art Adams has a nice break down of the ideas

Here is an excellent video of how one time lapse sequence was created for the series. Amazing effort. BBC Life of Plants

This article gives a good base for understanding the concepts behind grading video. Grading Demystified

Nobody sells Interview Lighting.