Image Gallery: Cameras

	Diagram showing how a camera forms an image
	Diagram showing how an SLR (Single Lens Reflex) camera viewfinder works. The viewfinder sees the exact same image as the film does by using a mirror. At the instant that the button is pushed, the mirror flips out of the way and the light goes to the film.
	Simple diagram showing how an SLR camera works (from Encyclopedia Britannica).
	Diagram showing that a real camera lens is not ground exactly to a spherical shape because rays far from the center are not focussed correctly. Instead, the lens has a more complicated shape as shown in the diagram.
	No single lens has the ability to make a perfect image, especially large lenses. Camera makers use various kinds of lens combinations to correct these imperfections, as shown in this diagram.
	Illustration demonstrating the difference between using a camera at fixed position with a telephoto lens (fixed persepctive) and moving the camera closer (changing perspective) (from Encyclopedia Britannica)