Barthes wrote this book out of urge to discover the real nature of Photography. In the first part of the book he establishes his own system to do that. This system is based on two "cathegories" that Photography contains, studium and punctum. In the second part he wants to come closer to eidos, the nature of Photography. Therefor he takes one of his photographies, showing his mother as a child. Out of his emotions by this photography he builds the theory, often comparing it with another art, Film and sometimes also with Theatre. The book can also be recomended to wider public, not only philosophers, because it is written in a simple, understandable way, but is still opening some major questions regarding its subject.