Many pictures could be considered to be action subjects, including children playing in a garden and a falconry demonstration. The factor that determines whether these are pictures of people or birds, rather than action shots, is the motivation behind the picture. If the children are less important than the activity in which they are engaged then the picture might well qualify more as an action picture than as a portrait. Similarly, if you were to photograph a marathon with the deliberate aim of photographing a particular person, and were keen to get the nicest rather than the most dramatic picture of that person, then again this is more like portraiture than action photography. But if the activity itself, be it a sporting event ...

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