1. + Aperture and the Relationship to Depth of Field

2. + Lower f/stop = shorter depth of field

3. + Aperture set at 4.5 f/stop

4. + Aperture set at 5.6 f/stop

5. + Aperture set at 7.1 f/stop

6. + Higher f/stop = deeper depth of field

7. + Aperture set at 9.0 f/stop

8. + Aperture set at 11.0 f/stop

9. + Aperture set at 14.0 f/stop

10. + Aperture set at 18.0 f/stop

11. + 4.5 f/stop 18.0 f/stop

12. + Aperture set at 3.5 f/stop

13. + Aperture set at 4.5.0 f/stop

14. + Aperture set at 5.6 f/stop

15. + Aperture set at 7.1 f/stop

16. + Aperture set at 9.0 f/stop

17. + Aperture set at 14.0 f/stop

18. + Aperture set at 18.0 f/stop

19. + Aperture set at 22.0 f/stop

20. + 22.0 f/stop 3.5 f/stop

21. + But why would I want blurred or non-blurred backgrounds?

22. + CREATIVE CONTROL!!

23. + Perhaps you want everything in focus…

24. + Like this…….

25. + ….or this.

26. + Or perhaps you want just your main subject in focus, and other things blurred.

27. + Like this…..

28. + Or this….. This blurred background is also referred to as “Bokeh.”

29. + So….. Low f/stop number equals short depth-of- field, which equals sharp focus on the main subject and blurred backgrounds.

30. + Large f/stop number equals long depth-of- field, which equals focus on all elements in the picture frame and limited or no blurriness.