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?

Different assignments, different places, require different approaches. Sometimes I take minutes in a location, at other times days. There are many places that I have returned to over several years. When I photograph, I look for some sort of resonance, connection, spark of recognition.

If the quality of professional materials continues to erode or even dries up, then many of us silver photographers would have to follow the digital tidal wave. It certainly wouldn't be the end of the world, but in my opinion, having no silver material available would be a huge loss to photography.

For me, the subtlety of black and white inspires the imagination of the individual viewer to complete the picture in the mind's eye. It doesn't attempt to compete with the outside world. I believe it is calmer and gentler than colour, and persists longer in our visual memory.

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.

Essentially, I look for what is interesting to me, out there in the three-dimensional world, and translate or interpret so that it becomes visually pleasing in a two-dimensional photographic print. I search for subject matter with visual patterns, interesting abstractions and graphic compositions.

I often think of my work as visual haiku. It is an attempt to evoke and suggest through as few elements as possible rather than to describe with tremendous detail.