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. The symbol means "auto flash". In most camera modes, Auto-flash is enabled by default and will automatically fire if the camera thinks it needs more light.
12. If there is too much light, the picture will be washed out.
13. If there is not enough light, the picture will be too dark. 
14. The term "stop" is used in every aspect of photography to represent a relative change in the brightness of light. 
15. 1 stop brighter 
16. 2 stops brighter.
17. A longer shutter speed has more light.
18. A shorter shutter speed has less light. 
19. Before light reaches film, it must pass through an opening called an "Aperture". The aperture is like a pupil. You can control the aperture by setting the "Aperture Opening", also known as an F-Stop.
20. Smaller F-stops numbers = larger openings. Larger openings = more light.