1. Chapter 2: The Lens

2. Focal Length is the distance between the center of a lens and the film plane when focused at infinity

3. Different Focal Lengths have different Angles of View

4. Aperture = Focal Length / Diameter Aperture controls the amount of light entering the camera & Depth of Field

5. Depth of Field = the depth of the Plane of Sharp Focus (The plane on which the camera is focused or sharp)

6. Bokeh is the result of a very wide aperture

7. Wider depth of field = more focus

8. Plane of Sharp Focus can vary depending on your Depth of Field

9. Opening Up = More light Stopping Down = Less light

10. Plane of Sharp Focus can vary depending on your Depth of Field f/1.8 f/8 f/22

11. Use your Focusing Ring to set the Plane of Sharp Focus

12. Keep in mind, changing your aperture affects your light meter reading… f/1.8 @ 1/1000s

13. So when you change your aperture, you must also change your shutter speed f/1.8 @ 1/1000s f/11 @ 1/15s