Your response should contain at least 10 sentences. Your answer must contain a title, wrapped in double angular brackets, such as <<Understanding the Basics of Photography>>. Highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*. Include keywords *camera, lens, aperture, shutter speed, ISO, exposure, composition, focus, flash, histogram* in the response. At the end of your response, please explicitly add a postscript starting with *P.S.*.

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