Camera history and information

1. The "camera obscura" effect is when a tiny hole is cut in a wall of the dark room. Through the whole, light is focused, and the outside scene is projected upside down on the opposite wall.
2. When Isaac Newton and Christian Huygens perfected the understanding of optics and the process of making high quality glass lenses.
3. A glass lens, a dark box, and film.  
4. Modern cameras work the same. Light passes through the lens, into the camera, and exposes the film.
5. An electronic sensor called a CCD.
6. Auto mode controls the flash and exposure. On program mode you can control the flash and exposure.
7. Portrait mode is used to blur out the background. To do this, the camera tries to use the fastest available lens setting.
8. Sports mode is used to freeze motion. To do this, the camera will use the highest shutter speed possible. 
9. You have more control over focus, faster camera response, and encourages better composition.
10. Disabled flash. Use it when the natural light is better for the mood of the photograph.
11. Auto-Flash. This setting is enabled by default and will go off if flash is needed.
12. Too much light and the picture will be washed out.
13. The picture will be too dark.
14. A "stop" is a relative measurement of light. 
15. 2 stops
16. 4 stops
17. A longer shutter has more light.
18. A shorter shutter has less light.
19. The amount of light that passes through the lens.
20. By adjusting the F-Stop.