This is my second trial of making pin hole camera.
This time I made a smaller hole on an aluminium foil, the image is shaper.
And I use a smaller box as my camera body.
However, because I forgot to take the shorter image distance into account,
I had the explosure time too long, also there were some slits and the light is leaking into the camera, as a result, I took 13 pictures and only 4 of them can be developed.