Depth Of Field Article

1. Controlling

1.1. 2 main factors on how big the circle of confusion will be on camera's sensor

1.1.1. aperture

1.1.2. focal distance

2. Focal Length

2.1. Telephoto lenses

2.1.1. create shallow depth of field

2.2. Longer focal length

2.2.1. has shallower depth of field because it enlarges background to foreground

2.2.1.1. Ex: background looks more out of focus

3. Depth of Focus and Aperture Visualization

3.1. "focus spread"

3.1.1. implication of the circle of confusion

3.2. the distance that light is focused on camera sensor

3.2.1. depending on how light rays hit will show how out of focus it is

3.2.1.1. Ex: arriving at a disk or point

4. Depth of field

4.1. range of distance that appears sharp (does not change from sharp to unsharp)

4.1.1. Gradual transition; everything front or back of focus distance loses sharpness

4.2. varies on camera type, apertures, and focusing distance

4.3. sets max value for

5. Circle of Confusion

5.1. point that needs to be blurred to be seen as unsharp

5.2. outside depth of field; no longer acceptably sharp

5.3. sharp circle of confusion

5.3.1. blurriness goes unnoticed when enlarged to a standard 8x10

5.4. not a circle

5.4.1. large polygonal shape w/ 5-8 sides