The aperture setting is the easiest way to control DoF. Generally speaking, the wider the aperture, the shallower the depth of field. But opening up the aperture lets in more light. You may need to balance the increased light with a faster shutter speed.

I didn’t cover this variable because most photographers don’t change their camera body to control the depth of field. I mention this if you compare images with a friend with a different camera body.

Depth of field in photography describes how much of the scene is in focus. More specifically, DoF is the distance between the closest and farthest points of the image that are in focus.

Depth of field (DoF) refers to how much of your scene is (and isn’t) in focus. Photographers often manipulate the depth of field as a creative choice. They do this by selecting the right aperture for the scene they want to create.

But there’s a bit more to it than that. A 200mm lens focused at 9.8 ft (3 m) doesn’t show you the same composition as a 50mm lens focused at the same distance.

It’s possible to simulate a shallow depth-of-field effect digitally. You can add a blur effect in Photoshop or use apps or editing software that digitally simulate the effect.

Remember, it’s extremely difficult to create a blurred background if your subject and the background are too close. Creating the depth of field you want is all about depth relationships.

To do this, you use a shallow depth of field, meaning your foreground is in focus, but the background is not. This is also called bokeh.

Unlike landscape photographers, portrait photographers don’t necessarily want the entire scene in focus. If you’re taking street portraits, you want the person to be the main focus and an out-of-focus background to minimize distractions.

Our eyes are drawn to the in-focus area of a photo. So, as a general rule, you should focus on the point of greatest interest. Depth of field tells you how much of the scene is in focus in front of your focal point. It also tells you how much of the background is in focus.

Choosing the right depth of field affects all types of photography, from portraits to landscapes. Continue reading to understand depth of field and how to use it in your photos.

Understanding depth of field is crucial. It empowers you to manipulate focus creatively, which leads to captivating images. Mastering this concept lets you intentionally control sharpness and blur.

I’ll show you how to achieve deep and shallow depth of field. But there’s one more thing you need to know about the focus area.

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First, I enter my camera body (Sony a7R IV) and choose f/8. To be consistent, I’ll keep my subject’s distance at 10 ft (3 m). I’ll first enter 50mm as the focal length of my lens, then change it to 200mm.

Depth of field has much to do with distance—but relative distance rather than absolute distance. Moving farther away from your subject gives a greater DoF. In contrast, moving closer gives a shallower DoF.

The focal length of a lens also affects the DoF. Without getting too complex, a longer focal length, like 300mm, gives you a shallower depth of field than a 35mm wide-angle lens.

If you are taking a portrait, a very wide aperture like f/1.2 can put the eyes in focus while the nose and ears are blurry. Using the same f-stop, you can focus on the nose, but this will blur the eyes.

If you’re aiming for a deep depth of field, you may need to figure out exactly where your focus point should be. You can figure this out by calculating the hyperfocal distance.

The depth of the field isn’t affected by just one setting on your camera. As we’ve shown, you can change three variables to affect the depth of the field. These are aperture, focal length, and relative distance.

Your sensor size also affects the depth of field. Larger sensors have a shallower DoF. So, a crop sensor camera (APS-C sensor) generally has a narrower depth of field.

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Compare these two images below, taken from the same vantage point. The only setting that changed was the focal length. The first image was taken at 133mm, and the other image was taken at 100mm. Notice the change in blur in the waterlilies in the background.

A landscape photographer may take three or more images. The first focuses on the foreground element, the second on the midground, and the third on the background.

You have three options for decreasing your depth of field. You can widen your aperture by decreasing the f/stop number, moving closer to your subject, or using a longer focal length.

Now that I’ve introduced you to the DoF calculator, play with it a bit. Enter your camera body and focal lengths to see how the numbers change. Many factors control the depth of field.

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You can use this mode to get a blurred background, even if you’re not shooting portraits. The original settings of the first photo on the left were 9.0mm, f/2.8, 1/121 s, and ISO 32. Clicking the edit button gives you some options to change the aperture.

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Newer iPhones make it easier to control the effect. I still can’t change the aperture on my iPhone 11S, but I can simulate and control shallow depth of field.

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The DoF calculator also tells me the hyperfocal distance. This is important for landscape photographers. Hyperfocal distance tells me where to focus in the scene to get a sharp focus to infinity. (Infinity is as far as the eye can see.)

Macro photographers use long macro lenses to capture small subjects like flowers and insects. These lenses let photographers get very close to their subjects.

Generally, an f-stop of f/2.8 has a blurrier background than an f-stop of f/16. If you want to create a shallow depth of field, select a wide aperture. Select a smaller aperture if you want more of the scene in focus.

Notice that the DoF in front and behind my subject changes a lot. With an aperture of f/11, my DoF was 9.32 ft (2.84 m). With f/2.8, only 1.97 ft (0.6 m) will be in focus. It’s a much narrower range.

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The portrait below has a shallow depth of field. Notice the near eye (left) is in focus, but the back eye (right) is blurred. To get both eyes and nose in focus, you would need to use a narrower aperture (larger f-number).

If you’re not getting the depth of field you want, the next thing to change is relative distance. You can try getting closer to your subject. If that doesn’t help, move your subject away from the background.

Changing the depth of field in photography is a great technique all photographers should know. To increase your depth of field, you have three options. You can narrow your aperture by increasing the f-stop number, moving further away from your subject, or using a shorter focal length.

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Imagine looking out into a landscape through your camera. Depth of field starts at the closest in-focus object and ends at the farthest in-focus object.

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The top highlights DoF when using an aperture of f/2.8. The girl is in focus, but the dog in the foreground and the tree in the background are blurry.

With a 50mm focal length, my focus area would start at 7.68 ft (2.34 m) and extend to 13.71 ft (4.18 m). Everything within this 6.03 ft (1.84 m) range will be in sharp focus.

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When you select a focal point, the focus isn’t equally distributed in front of and behind this point. Most of the time, one-third of your focus falls in front of your focal point and the other two-thirds behind it.

A shallow depth of field is a great way to separate the foreground from the background. This technique is good when the background is uninteresting or distracts attention from the subject.

In the image below, only the foreground is in focus. The background gives a sense of the environment without distracting from the foreground. The foreground flowers are in focus, while the background of the garden is blurred.

But because they are close to their subjects with long-focal length lenses, the depth of field is often very shallow. You can see this in the close-up of spoons on a textured background below.

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Finally, the focal length of your lens also impacts the DoF. If you have a zoom lens, try a with less zoom for a greater depth of field. Changing the focal length also affects your composition. So, balancing the perfect DoF with the perfect frame is best.

To combat both situations, photographers use a technique called focus stacking. They take many images of a scene and change the focal point slightly with each image.

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But with a 200mm focal length, my focus area would start at 9.68 ft (2.95 m) and extend to 10 ft (3.05 m). This is a much shallower depth of field. Only 3.94 inches (10 cm) will be in focus!

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This calculator also tells me that 2.79 ft (0.85 m) in front of the subject will be in focus (30.07%). Six feet and 5 inches (2 m) behind my subject (69.93%) will be in focus. This is roughly one-third versus the two-thirds I mentioned above.

If you want to take advantage of a narrow depth of field, you need distance between the subject and background. For instance, if your model stands against a wall, you can’t blur the wall. The model and the wall are on the same plane of focus. So, ask your model to step towards you.

I’ll finish our article by introducing you to some topics related to depth of field. Focus stacking is a way of creating a very deep DoF. It is also possible to simulate a shallow depth of field. This is particularly useful when using a smartphone.

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If your phone’s camera doesn’t have this feature, photo apps like Focos for iPhone simulate depth of field. Apps like this change the aperture virtually. Using the Focos app, we created an image that simulated an f/20 aperture (middle photo) and f/1.4 (right)

Deep and shallow depth of field fall on a continuum. You can set your aperture for an entirely sharp scene or have a very small line of focus. It’s up to you. Most photographers find a sweet spot somewhere in the middle.

With a wide-angle lens, you can equalize the compositions by walking closer to your subject. Doing this makes the difference in depth of field less noticeable.

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Three elements change how much of the scene is in focus. These are aperture, focal length, and relative distance. Once you know how to control the depth of field, you can decide how deep or shallow you want your focus to be.

Changing your aperture (f-stop) is one of the best ways of changing the DoF. Generally, the wider the aperture, the shallower the depth of field, and vice versa. Remember that wide apertures have small f-numbers.

When you adjust one setting on your camera, you’ll need to adjust the other two to get the correct exposure. You can learn everything you need about how to do this with the exposure triangle.

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Let me give you an example. I will use PhotoPill’s online depth of field calculator to compute how far in front of and behind a subject will be in focus. It might help to open the calculator yourself and follow along.

Landscape photographers often want the entire scene in focus, from the closest rock to the farthest mountain. This is a “deep” depth of field. In the landscape image below, there is a deep DoF. The waterfall in the background and the trees and rocks in the foreground are in focus.

I enter my camera body (Sony a7R IV) and 50mm lens. But this time, I’ll put f/2.8 instead of f/11. To be consistent, I’ll keep my subject’s distance at 9.84 ft (3 m).

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With landscapes, if you focus on the foreground, the background appears blurry. If you focus on the background, the foreground looks out of focus. To fix this, the focus needs to be somewhere in the middle between the foreground and background. This focus point is the hyperfocal distance.

This is one reason portrait photographers prefer apertures of f/1.4 to f/5.6. It’s also why landscape photographers prefer apertures from f/11 to f/22. But that’s not all there is to it. Other details factor into how wide or narrow your depth of field is.

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First, I enter my camera (Sony a7R IV—because sensor size affects DoF. Then, I enter the focal length of my lens, which is a 50mm lens set at f/11. Lastly, I put in how far away I am from my subject, about 9.84 ft (3 m).

It is possible to combine a shallow and deep depth of field in one photo. The photo below cleverly uses a smartphone to capture a wide DoF in the image. Then, they photographed the image on the phone using a shallow depth of field.

A 200mm focal length gives you a field of view of about 10 degrees. A 50mm focal length gives you a field of view of 40 degrees. That’s a very different composition.

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Let’s give you an example. Here is a portrait of a cat taken with an iPhone. When you select Portrait mode, the camera automatically applies a background blur to the image.

Smartphones are limited in their ability to create blurred backgrounds. But you can still achieve the effect by getting close to your subject or using a depth-of-field simulator app.

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There is one instance where your DoF can be manipulated. That is by using a tilt-shift lens. By playing around with the “tilt” of a lens, you can place an entire scene in focus when using a wide aperture.

There are situations where it is impossible to get a deep enough depth of field in one image. Landscape photographers sometimes struggle with this. They may find it hard to focus on a close foreground element while keeping distant elements in focus.

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We talk about depth of field in terms of “deep” and “shallow.” Deep depth of field is also called “wide” or “large.” Shallow depth of field is also called “small” or “narrow.”

The DoF calculator (image below) says the nearest point in focus is 7.05 ft (2.15 m) away. The furthest point in focus is 16.37 ft (4.99 m).

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