To replace the lens for Gopro Hero 3, first, prepare for the new original lens for Gopro Hero 3,

Original Gorpo Hero 3 Lens

Then begin to open the gopro, it needs some tools, screwdriver, crowbar,tweezers.

First step, unclench the front panel,

Second, remove four screws, unclench from the side, then we can dismantle the circuit board.

Dismantle the CCD,

Manual Focus,