A lot of people think that when you have grand scenery, such as you have in Yosemite, that photography must be easy.

I think landscape photography in general is somewhat undervalued.

I began taking pictures in the natural world to be able to show people what I was experiencing when I climbed and explored in Yosemite in the High Sierra.

There is no question that photography has played a major role in the environmental movement.

I think that cognitive scientists would support the view that our visual system does not directly represent what is out there in the world and that our brain constructs a lot of the imagery that we believe we are seeing.

I find it some of the hardest photography and the most challenging photography I've ever done. It's a real challenge to work with the natural features and the natural light.