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Japanese lens maker Tokina has developed this intriguing “rain dispersion filter” for TV broadcast cameras that keeps the video image raindrop-free with the help of a special hydrophilic coating. “Although from the front it looks like the lens would still be obscured some, the water that is being sprayed onto the filter hardly shows up at all, and then only for a split second,” wrote PetaPixel.
See also this demo
