where does light come from
Where Does Light Come From? Most people know where light comes from. It comes from the sun, from light bulbs, from televisions, but why it comes from these objects is a mystery to many. No matter what the source, light is generally produced via the same mechanism: electrons changing their orbits around nuclei. How does this work?
Light comes from your source (sun or studio lights) and bounces off of the every object around you. Your lens collects that light and shines it (inverted) onto the picture plane. The problem is that big holes - or just an open square for the film produces an extremely blurry image.