Digital cameras are now ubiquitous, which makes sense because they take great pictures and are wonderfully efficient.

But while I am no slouch in the electronics-adoption stakes, I have stuck to my standard 35mm camera, even though it means I always have drawers full of unprocessed film.

The reason, I tell people, is the necessary limitations of film. I like the discipline of thinking carefully about which photos to take and not to take, knowing that I am restricted by the ...