Remove the metal frame from battery housing unit.

Separate the lens from the body, being careful to keep all of the parts together. Set aside in a safe location.

Take a picture of how the lens is attached to the rest of the camera so that it is easy to put back on when re-assembling the camera.

Be careful not to apply too much force when pulling apart the metal frame. You may cause damage to nearby wires and/or stretch the metal frame.