Swapping lenses can be a chore, especially in ski gloves. The M2 – which has a huge field of view – employs eight magnets around the frame for absurdly easy lens switching. You don't even have to take it off your face. [$240; anonoptics.com]
Gear of the Year
The best tools, tech, and toys of 2013.
Plus: Lance Armstrong's Downfall
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