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Depth of field
- 1. Depth of Field The Basics
- 2. Describe the relationship between the camera distance, focal length, aperture and depth of field. Choose certain settings to get desired depth of fields. Create photos with varying depths of field.
- 3. Depth of Field • Area in front of the camera where everything looks sharp and in focus.
- 5. Telephoto = Less Depth of Field • Your depth of field decreases as you increase your focal length. • Telephoto lens = a much shallower area in focus that with a normal lens.
- 7. ISO: 150 | f/5.6 | 1/125s | 250mm
- 8. Wide Angle = Greater Depth of Field • Your depth of filed increases as you decrease your focal length. • Wide angle lens = a much deeper area in focus than with a normal lens.
- 10. ISO: 150 | f/5.6 | 1/125s | 10mm
- 12. Aperture Changes Your Depth of Field • Your depth of field increases as you close down your aperture. • At f/16 you have more depth of field than at f/2.
- 14. f/4
- 16. f/6.3
- 18. Distance to Subject • Your depth of field increases as your subject gets farther from the camera. • The farther away the subject, the more depth of field; the closer the subject, the less depth of field.
- 21. Hyper Focal Length • You always have less depth of field in front of your point of focus than behind it. • This is especially noticeable at distance of twenty five feet or less. • Important in landscape photography.
- 24. Describe the relationship between the camera distance, focal length, aperture and depth of field. Choose certain settings to get desired depth of fields. Create photos with varying depths of field.
Editor's Notes
- Depth of field (DoF) is an important concept to understand and can make your photography stand out. Controlling the amount of depth of field in a photograph is one of the most important things you can do. It's how you can control what is in sharp focus and what is not in focus. This is vital because it makes it possible to emphasize certain parts of your photograph and de-emphasize other parts.
- Here are our learning objectives for this learning module. You will review this as the end of the lesson. This is a great way to gauge your level of understanding of the material. At the end of the lecture, review these objectives and ask yourself if you understand everything. If not, reach out for help or revisit the content from this learning module.
- Depth of field is simply the area in front of your camera where everything looks sharp and in focus. For example, if you’re focused on somebody standing ten feet in front of the camera, your depth of filed might be from eight feet to fourteen feet. That means objects falling within that area will be acceptably sharp and in focus; objects falling outside the area will be soft and out of focus.
- Here is a an example of depth of field as it relates to a linear length and what is in focus.
- There are several important things to know about depth of field. First is this: Your depth of field decreases as you increase your focal length. In other words, with a telephoto lens, you have a much shallower area in focus that with a normal lens. That’s why with a zoom lens, you zoom in to telephoto for focusing—it makes it easier to see the exact point where your subject is the sharpest.
- Here is an example of how using a telephoto lens results in less or a shallow depth of field.
- The following image was shot at ISO: 150 | f/5.6 | 1/125s | 250mm
- The next thing to know is: Your depth of filed increases as you decrease your focal length. With a wide angle lens, you have a much deeper area in focus than with a normal lens. This is why, when you’re shooting in uncontrolled situations with a zoom lens and don’t have time to zoom in and check focus, you are better off setting an approximate focus and staying at a wide angle. This will give you your best chance of keeping everything in acceptable focus.
- Here is an example of how using a wide angle lens results in greater depth of field.
- The following photo was shot at ISO: 150 | f/5.6 | 1/125s | 10mm
- Here is are the two examples side by side. You should be able to tell the difference in the depth of field by how much in the background is in focus.
- Another thing about depth of field: Your depth of field increases as you close down your aperture. At f/16 you have more depth of field than at f/2. When you make your aperture smaller, it’s essentially the same as squinting your eyes to see something smaller in the distance. This is why on film cameras we open the lens to its widest aperture to focus: it makes it easier to see the exact focus point.
- In this example, you can see how a larger aperture of an f/2 results in a more shallow depth of field.
- Now take a look at this photo that was shot at f/4.
- Conversely, in this example, you can see how a smaller aperture of f/16 results in a greater depth of field.
- Now take a look at this photo shot at an f/6.3.
- Here is are the two examples side by side. You should be able to tell the difference in the depth of field by how much in the background is in focus. Now evaluate the f/stop and relate that to the depth of field.
- Next: Your depth of field increases as your subject gets farther from the camera. The farther away the subject, the more depth of field; the closer the subject, the less depth of field.
- In this example you can see how the subject distance changes the depth of field.
- Finally, You always have less depth of field in front of your point of focus than behind it. This is especially noticeable at distance of twenty five feet or less. At these near distances, you can usually figure on your depth of filed extending approximately 1/3 in front and 2/3 behind your point of focus. So, if you’re working with a shallow depth of field and you want to take maximum advantage of it, focus on a point 1/3 of the way into the area you want in focus.
- In this example, you can see how hyper focus can help you maximize the amount of focus and increase your depth of field.
- Take some time and review the learning objectives for this learning module. Be sure to ask yourself if you understand everything. If not, reach out for help or revisit the content from this learning module.