1. Aperture Depth of Field

11. What is Depth of Field ? The depth of field refers to which part of the image you want to appear in focus from foreground through to background and is determined by a combination of the aperture setting and the focal length of the lens.the aperture setting the focal length of the lens

12. The widest aperture (smallest f-number) gives the least or shallow depth of field. These images generally have a single object sharply focused, with the rest of the image blurry. This is a great and easy way to direct the viewer's attention.

14. On the other hand, smallest aperture (highest f-number) results in greater range of items that appear clearly focused and is said to have a large depth of field.

18. As well as changing the zone of sharpness in an image, each aperture f-stop in the series also doubles,or halves, its brightness.

23. CLOSE-UPS THINK APERTURE

30. http://www.canonoutsideofauto.ca/learn/ This site will allow you to play with settings and get instant feed back Click on the PLAY button on the bottom right