One from the “why didn’t I think of THAT” department: a fisheye lens from a standard peephole just like in your front door. You can pick up a peephole (sans door) for around $10 at most hardware stores and be shooting cool ultra-wide-angle, amusingly distorted images with your point-and-shoot digicam in the time it takes to simply tape it to your lens.

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Virgil Griffith created the Wikipedia Scanner to catch companies and organizations who were editing Wikipedia articles to their own benefit. In this article, you’ll take a close look at how the WikiScanner works, look at some particularly controversial or simply bizarre examples of anonymous editing and consider some of the reactions to the WikiScanner. You’ll also see how you can use the WikiScanner to see what some organizations and companies may be up to on Wikipedia.
http://computer.howstuffworks.com/wikipedia-scanner.htm

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Tags: cameras, instructable, technology news, video, wikipedia, youtube