I remembered seeing it and it was this metallic turbine and I thought it was beautiful. I had never been in a power plant before, but I felt, without being overly dramatic, compelled to make photographs of this for myself.

He was a very generous soul and was exceptionally dedicated to the medium of photography.

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.

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.

Whatever it takes to get the image to reach that level is what that photographer needs to do. And for me, I just have such a love of the tactile and sensuous quality of a black and white silver gelatin print.

I've never seen a surface that I think is more seductive in image making.

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.