What are the lens dimensions for Google Cardboard? Does it need to be biconvex? Is 40mm (25 optic power) the best focal length? What should be its size/diameter? - Quora
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What are the lens dimensions for Google Cardboard? Does it need to be biconvex? Is 40mm (25 optic power) the best focal length? What should be its size/diameter? - Quora
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