Quote Originally Posted by MartinP View Post
It would be useful to have somewhere for the light to get in, whether that is a hole or an assembly of glass parts, so how about a camera body made entirely of glass? Some of it would be black and probably painted, with other bits transparent.

I'm not sure how to make a glass spring to drive the shutter. Possibly a gravity powered "falling hole" shutter could be tried instead, but then you are limited somewhat in the orientation of your camera....
In the 19th century glass balance springs were experimented with on chronometers. I forget exactly why they were abandoned - probably the insane expense of making them and there were more practical methods of securing the desired result - but it wasn't fragility.