Rainaway camera lens - GIF

[ToolTalkBot]

Rainaway camera lens.




Previously:

Grinding an optical glass lens - GIF
Light passing through different lenses - GIF
Macro camera lens - photo
Manual focus lens cutaway - photo
Short-throw projector lens - photo

[IntheGroove]

Clear view screens have been around for over 100 years...

[nova_robotics]

You can get these for CNC machines and they're awesome. Normally a window gets completely coated in coolant and you can't see anything. This is pretty much the only thing that'll actually allow you to see the workpiece in a lot of cases.

[Floradawg]

This guy has a screwtube channel that's entertaining and informative. He often takes apart power tools to explain whether they are properly designed.