This nifty little plastic tool provides a super simple, super cheap means for adjusting the lens of your Raspberry Pi Camera Module V2 (not compatible with the Raspberry Pi Camera Module 3!).
Simply place the little hole opening snugly over the camera lens – it should set nicely with no need to force. Then turn like a dial to the left or right and adjust the focus to your heart's content!
For use with the Raspberry Pi 8MP (version 2) cameras only
Product Dimensions: 23.0mm x 23.0mm x 8.4mm / 0.9" x 0.9" x 0.3"
Product Weight: 2.0g / 0.1oz