Popular YouTube channel creates camera lens from scratch using sand and rocks

Popular YouTube channel 'How to Make Everything' has published a new video showing the creation of a camera lens from scratch. The project didn't start with pre-made components, as many DIY projects do, but rather with the purely raw materials, including sand and rocks for the eventual lens glass and copper housing. The new project follows one involving the creation of a pinhole camera from scratch that the channel published in September 2018. This time around, the channel's Andy George spends n...