camera history

         1. Explain the “camera obscura” effect. How is it achieved?

Inside a completely dark room, a tiny hole is created in one wall. Through the hole light is focused, and the outside scene is projected (upside down) on the opposite wall.This was the first camera. The hole acted like a lens, focusing and projecting light onto the wall of the dark chamber.

2. What invention during the 17th Century helped man get a step closer to creating the modern camera?

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, in the 17th century.

 3. What were the parts of the first modern camera invented by Niepce?

 He added *film* to create the first successful photograph, and the modern camera was born:
A glass lens, a dark box, and film.

4.What do modern digital cameras have in common with Niepce’s camera?

Light passes through the lens, into the camera, and exposes the film. And guess what? The end result is still a photograph.

5. What do digital cameras use to capture an image?

digital cameras capture the images with an electronic sensor called a CCD. Photographs are stored on reusable computer memory devices.

6. What is the difference between the Auto Mode and the Program mode?

Auto The camera will completely control flash and exposure.Program automatic-assist, just point and shoot. Unlike full auto mode, you can usually control flash and a few other camera settings.

         7. What is the Portrait mode used for? How does it work?
          Portrait To attempt to blur out the background, camera will try to use the fastest available lens    setting (aperture).


         8. What is the Sports mode used for? (not just sports) How does it work?
          Sports To freeze motion, camera will use the highest shutter speed possible. 
       
         9. Why should you do a half press on the trigger button?

• faster camera response time
• more control over focus
• encourages better composition

   

       10. What does this symbol mean?

this symbol means disabled flash or no flash.

 When would you use this? 

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.What does this symbol mean?

auto flash

When would you use this?

Auto-flash is enabled by default and will automatically fire if the camera thinks it needs more light.

 

12. What happens to your photo if there is too much light?

Too much light and the picture will be washed out. . 

13. What happens to your photo if there is not enough light?

Not enough light and the picture will be too dark

 

14. What is a “stop.” 

a relative change in the brightness of light.

15. How many stops brighter is the new planet if there are two sons instead of one?

 2

16. How many stops brighter is the new planet if there are four sons instead of two?

 4

        

17. What affect does a longer shutter speed of have?

     more light

 18. What affect does a shorter shutter speed have?

     less light

 

19. What does the aperture control?

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.

Smaller F-stops numbers = larger openings

larger openings = more light
 

20. When adjusting the aperture, how can you increase the amount of light?

 using a smaller f-stop number which has a larger opening which increases the amount of light.