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The Seadragon was fitted with special equipment, including sonar to ping off the ice above and a light meter to help determine ice thickness.

Bright, reflective snow can trick your light meter, causing auto exposure to underexpose and create gray snow.

Q: The old light meter trick works every time, right?

“We literally turn on every sensor that the device has,” Cohen explains, including the microphone, light meter and GPS.

He said, ‘I don’t need a light meter.’