Camera History

1. The effect came to be known as the "camera obscura" is Latin for "dark room". This was the first camera. The hole acted like a lens, focusing and projecting light onto the wall of the dark chamber. 

2. In the 17th century, the modern camera came one step closer 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. Light passes through the lens, into the camera, and exposes the film. The end result is still a photograph.

5. They use an electronic sensor called CCD. 

6. The fully automatic (A)uto or (P)rogram mode is the default for most modern cameras. The photographer can simply aim, press the button, and almost be guaranteed a great image.

7. Portrait mode will blur out the background, and the camera will try to use the fastest available lens setting.

8. Sports mode is to freeze motion. The camera will use the highest shutter speed possible. 

9. The half pressed button is helpful in many ways, including faster camera response time, more control over focus, encourages better composition.

10. The symbol means "no flash". There are many cases where you may not want flash at all. The mood of the photograph can sometimes be more dramatic when the natural light is used.
11. This symbol means that the camera will fire if it thinks it needs more light.

12. If there is too much light, the picture will be wasted.

13. I there is not enough light then the picture will be too dark.

14. "Stop" means that there is a relative change in the brightness of the light.

15. It would be 4 stops brighter.

16. It would be 16 stops brighter.

17. For longer shutter speed you get more light.

18. For shorter shutter speed you get less light.

19. The aperture controls how much light goes in the camera.

20. To increase the amount of light the aperture has to be more open.