German lenses dissected: Glad it's not mine
At the Deutsches Technikmuseum Berlin in Germany, antique German cameras have been sawn lengthwise in half to show the all nitty-gritty.

German optics are famed for their precision engineering and beautiful lens coating that can affect the sharpness of pictures. But have you ever wondered how the insides of a Leica or Carl Zeiss lens look?
At the Deutsches Technikmuseum Berlin in Germany, there is a side exhibit of antique German cameras. But what makes these pieces so intriguing is that some of these items have been sawn lengthwise in half to show the all nitty-gritty--small but important components that make the handling and operation of the optics so smooth. Think of it as similar to the Body Worlds showcase, except for cameras.
(Source: Crave Asia via Wired)