There is no film in the camera because the camera is the film.
There are lots of instructions on how to build a pinhole camera. However, none comes as raw and direct as Thomas Hudson Reeve‘s pinhole camera where the camera itself is the final print. Get this: he takes a 11×14 inch sheet of photographic paper, cuts and folds it into a box in complete darkness and, when he is ready to expose the shot, pricks a hole in one side. How much more raw can you get!
View the pinhole camera shots at: Paper Cams.
source pixiq