300 words summary of article about photography

http://www.skol.ca/files/FromPresenceToThePerformative.pdf

Your response should illustrate your understanding of the text. The assignment should identify the key argument/idea of the reading and summarize key points. This assignment is about seeing you understand key points, NOT a statement of your opinion. Refrain from extensive introductions or preambles, just get right into the key ideas.

300 words.