Recently I stepped down as chairman of a national research funding organization. As a farewell present I got books of Ansel Adams. So, now I have An Autobiography, The Making of 40 Photographs, and 400 Photographs. He was both an environmental activist and a photographer. He made beautiful black and white pictures of Yosemite National Park over a long period of time, so you could see the environmental changes. The picture that made him famous is Monolith, the Face of Half Dome.
In the seventies and eighties I spend in total one and a half year in California working for UC Santa Cruz and Stanford University. During these days I visited Yosemite National Park several times, hiked a lot in the valley and the upper park. It is a very beautiful area.
Imagine in the days of Ansel Adems he had to carry all the heavy stuff up the mountains. He could only take a limted number of photographic plates (pictures), so, he really had to make sure the picture would work out. Because of that he invented the zone-system to match the dynamic range of the subject he wanted to photograph and the limitations of the camera. The zone-system goes in 10 steps from pure black via different shades of gray to pure white. Nowadays the digital camera and the software handle the dynamic range quite well, although in some cases certain parts are completely white without any detail (or black). In that case the dynamic range of the camera is not sufficient for that particular situation. Again Ansel Adams could see that even before taking the picture.
Yosemite Park is still waiting for me 🙂