I took a workshop from him a few months after that. That experience changed my whole approach to photography. At that workshop in Yosemite in 1973 I decided I wanted to try and see if I could pursue this for myself, and I'm still trying.

A photographer needs to be a good editor of negatives and prints! In fact, most of the prints I make are for my eyes only, and they are no good. I find the single most valuable tool in the darkroom is my trash can - that's where most of my prints end up.

It was an experience that was exceptional. People frequently ask what it was like and it truly was inspiring. Sometimes during his lifetime, people would try and put him on a pedestal and that's not where he wanted to be, but he was really a great individual.

You can also see sometimes that the best pictures are the ones where you didn't try so hard, where you were just enjoying the process - and you didn't even know why you were making the picture. It felt right. If someone asked, 'Why are you making this picture?' you probably couldn't describe it very well - and that's why it needs to be a photograph.

Obviously, we can see what was in front of the camera, but if a photograph is honestly made, it's a bit of a self-portrait. I think it's impossible for a photographer who is working honestly to keep this from happening.

In 1979, I received a phone call from Ansel Adams asking me if I would be willing to consider coming to work for him. I was teaching photography in Southern California at that point.

The first day at the power plant I found myself photographing some steam vents on the roof of the structure. And I remember consciously thinking that they were just like trees but they were metal.