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.

To me, photography is 90% a retrospective experience. There's the part of pursuing the image, and exposing the film, but once you make the exposure, you're always looking backwards in time. I like that aspect of photography.

I find the surface of a photograph a thing of beauty in and of itself, and it is this surface that makes a photograph unique relative to other two-dimensional media.

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.

And the camera position, the organization, looking for repeating forms, shapes, trying to set up a visual rhythm seemed to come very natural. All of a sudden I was in a forest of aluminum and steel rather than a forest that we might think of in a traditional sense.

I support any procedure that allows photographers to express themselves, whether that involves color, black and white, platinum, palladium and digital technology.

It had rained on some vivid green ferns in Maine and it was quite beautiful. I was moving the camera slightly and studying the ground glass. Looking at those 20 square inches, trying to find out just what were the right elements to include.