The Camera history and basic functions

1. Hole in the room acted like lens and focusing and projecting lights into dark room

2. Modern camera cam closer when Isaac Newton and Christian Huygens perfected understanding of optics and process of making high quality lens.

3. A glass lens, dark box, and film

4. Film

5. Camera uses computer to focus and exposures, so you don't have to.

6. Unlike  Auto mode, in program mode user can control the flash and few other camera setting.

7. Portrait mode is used for taking photo of person. In the mode it will blur out the background.

8. It's used for sports photos. Camera will use highest shutter speed possible

9. For focus lock

10. It means no flash. Use when you have good natural lights for photos.