This chapter is subject orientated. It takes a cross-section of 11 kinds of subject matter from sports to simple astronomy, outlining some typical professional markets and the general organization and technical approach to the work, plus hazards to avoid. Of course, whole books could be written about each subject, but running them together here points out the different pressures and priorities they impose on you as a photographer. Perhaps you will never have to tackle all of them, but then you are unlikely to specialize in only one type of subject either, especially if you are just setting up as a professional.
It is dangerous to be too categorical ...
