Then they developed the pictures and loaded them onto three different projectors, one with a red filter over the lens, one with green, and one with blue.

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In the Dolby case, the glasses use multiple coatings on each lens to filter out different sets of frequencies of light.

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The more individuals realize they have a vested interest in creating sustainable systems, the more their social networks can filter content through that lens, shifting the balance of opinion towards more sensible policies.

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Several suggestions have been put forth, ranging from a manufacturing flaw with the sapphire lens of the iPhone 5, to a problem with the IR filter, or a bug in the iOS 6 software.

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If that weren't enough, the FE-5020 and FE-4000 also include "Magic Filter" functionality (which some might call "tacky filters, " if the fish eye lens and sepia tone effects aren't really your bag).

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