Enhanced Version:
The Raspbery Pi Cam V2 seems to have some issues with the focus.
Smart solution:
Enhance Your cam!
The tiny wrench can be used to adjust the lens for better pictures.
This is the professional version,- made of steel.
Made 3 different shapes,- one of them should fit.
BIG 3D preview: https://www.shapeways.com/model/3dtools/4872623/1/23?key=a28c79aeb2c520b2d7fd2ec033a9597f
Other designs & sizes on request