Parts 1: The Camera

1. A dark "room" with a tiny hole in the wall, projecting light onto another wall of the "room".
2. The lens.
3. Film.
4. The light still has to pass through the lens and expose the film.
5. With an electric sensor called a CCD.

6. Auto: Camera has complete control of exposure and flash. Program: Same as auto only you can generally control flash and other few settings
7. To blur the background.
8. For fast motion scenes., to freeze motion.

9. To let the camera focus, faster camera response, and better composition.

10. No flash, used for brightly lit scenery.
11. Auto flash, used when you're not sure if its bright enough in the area.

12. It will be washed out.
13.It will be too dark.

14.A relative change in the brightness of light.
15. 1 stop
16. 2 stop

17. More light.
18. Less light.
19. How much light is allowed through.
20. Changing it to smaller F-stop number to allow a larger opening for more light.