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I was watching Pacific Rim Special Features disc last night. In one brief production scene, I saw a half moon shaped object which was chrome or mirror like. In another movie special features, I saw the same thing. It looked as though it was in the shape of a dumb bell, only with a thin rod between two half spheres. Just curious if someone could explain what this is and how it is used in production?

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Maybe better for Video Production? –  Napoleon Wilson Oct 19 '13 at 15:18
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If you have the disc, could you grab a screenshot? –  coleopterist Oct 20 '13 at 5:09
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