'While Fashion Magazine has a single photographer-author, it's still a magazine, not a book. So it doesn't follow my usual mode of slow, solitary production. It's collaboration. The ideas for the collaboration were formulated very quickly. I was approached by the folks at the Paris office of Magnum to work on this issue late last year. I immediately said yes. I was a huge fan of the previous two editions (by Martin Parr and Bruce Gilden) and was looking for an excuse to play with fashion. ... I often say that when I am making a portrait, I'm not 'capturing' the other person. If the photograph documents...