How much space in front of the lens will be in focus? That question defines Depth of Field - but this simple concept has lead to a staggering amount of confusion in today's multi-format camera environment. Through some fundamental scientific demonstrations, we will clarify concepts like circle of confusion and lens equivalency. For fundamentals make sure you check out: The History and Science of Lenses www.youtube.com/watch?v=1YIvvXxsR5Y The Properties of Camera Lenses www.youtube.com/watch?v=CGGUXAMliqM *ERRATA* The ISO in regards to Lens Equivalents should be multiplied by ISO^2 because we're dealing with two dimensions not just one. Multiplying by just the ISO will result in slightly darker image (as see in the demo)

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