I enjoy places that have mystery and atmosphere, perhaps a patina of age, a suggestion rather than a description, a question or two. I look for memories, traces, evidence of the human interaction with the landscape. Sometimes I photograph pure nature, sometimes urban structures.

Instant gratification in photography is not something that I need or desire. I find that the long, slow journey to the final print captivates me far more.

Getting photographs is not the most important thing. For me it's the act of photographing. It's enlightening, therapeutic and satisfying, because the very process forces me to connect with the world. When you make four-hour exposures in the middle of the night, you inevitably slow down and begin to observe and appreciate more what's going on around you. In our fast-paced, modern world, it's a luxury to be able to watch the stars move across the sky.

It's possible to think of photography as an act of editing, a matter of where you put your rectangle pull it out or take it away. Sometimes people ask me about films, cameras and development times in order to find out how to do landscape photography. The first thing I do in landscape photography is go out there and talk to the land - form a relationship, ask permission, it's not about going out there like some paparazzi with a Leica and snapping a few pictures, before running off to print them.

Approaching subject matter to photograph is like meeting a person and beginning a conversation. How does one know ahead of time where that will lead, what the subject matter will be, how intimate it will become, how long the potential relationship will last? Certainly, a sense of curiosity and a willingness to be patient to allow the subject matter to reveal itself are important elements in this process.

I do have strong convictions and political opinions, but I don't think it's necessary to imbue my photographic work with them. I use photography as a vessel for visual material to flow through, to encourage conversation with the viewer. I try to present a catalyst and invite viewers to tell their own stories.

The photographer Ruth Bernhard used to tell me that this is like asking somebody how they evolved their signature. It is not something I've ever worked on consciously. I think style is just the end result of personal experience. It would be problematic for me to photograph in another style. I'm drawn to places and subject matter that have personal connections for me and I photograph in a way that seems right. Where does it all come from, who knows?