The result is an acceptably clear photo. Results are improved with better materials, but also with smaller apertures. Size makes a difference because the smaller aperture transmits only a few rays from each point reflect ed from the scene. The finer the rays of light, the tighter the cluster hitting the film and the better the representation of the image viewed In other words, pin-point accuracy .Larger apertures will transmit a much softer and less focused image. Experimenting with the foil apertures of various sizes will provide a dramatic illustration.
Shadow catching With camera in hand it is time to load the film and get to making photographs.
While real photographic film can be used, it is easier and a more visible learning experience to use photo paper as film. Let's review the basic structure and differences with a little, very little, chemistry . Photographic film is made in layers .The base is clear plastic coated with light sensitive material held in place by an emulsion layer. The light sensitive material is actually tiny particles of silver that when exposed to light, chemically react and etch a reflection of the image viewed. Not all film reacts the same.