It was amazing to watch him in the darkroom at an advanced age, still get excited when the results were pleasing. He still struggled like we all do in the darkroom and he struggled behind the camera, and when he had a success he was beaming.

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.

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.

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.

When I'm about ready to press the cable release on the View camera, I've tried to anticipate some of the challenges I'm going to encounter in the darkroom.

I find the single most valuable tool in my darkroom is my trash can

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.