Image by Sebastian Nikiel / Pixabay
Last Update: November 2, 2026
Quick Jump
- What Is Depth of Field in Photography?
- How Aperture Controls Depth of Field
- Three Main Factors That Affect Depth of Field
- Shallow vs Deep Depth of Field
- Understanding Bokeh in Photography
- How to Create Better Background Blur
- Best Aperture Settings for Different Photography Styles
- Depth of Field in Real-World Photography
- How Lens Choice Affects Bokeh
- Common Depth of Field Mistakes
- Practical Tips for Controlling Focus and Blur
- Frequently Asked Questions
Depth of field is one of the most important creative tools in photography. It determines how much of an image appears acceptably sharp, allowing you to isolate a subject, reduce distractions, or keep an entire landscape in focus.
Bokeh is closely related, but it describes something different: the appearance and quality of the areas outside the focus plane. Smooth background blur can help a subject stand out, while attractive out-of-focus highlights can add atmosphere and visual interest.
Both concepts are influenced by aperture, focal length, focusing distance, and the relationship between your subject and the background.
A portrait photographer might use a wide aperture to separate a person from a busy background. A concert photographer might use shallow depth of field to isolate a performer against colorful stage lights. A landscape photographer may choose a narrower aperture to keep foreground details and distant scenery sharp.
Understanding how depth of field and bokeh work gives you more control over the look and storytelling of your photographs.
What Is Depth of Field in Photography?
Depth of field refers to the range of distances in a photograph that appears acceptably sharp in front of and behind the point of focus.
Although you focus on a particular subject or distance, some areas closer to the camera and farther away can also appear sharp. The amount of this apparent sharpness is your depth of field.
There are two basic approaches:
Shallow depth of field
A relatively small area appears sharp.
Foreground and background details become increasingly blurred.
The main subject can stand out from its surroundings.
Deep depth of field
A larger range of distances appears sharp.
More foreground and background detail remains visible.
The viewer can explore more of the scene.
For example, a portrait photographed at f/1.8 may have the subject's eyes in focus while the background becomes a soft blur. A landscape photographed at f/11 may keep foreground rocks, trees, and distant mountains acceptably sharp.
Depth of field is more than a technical characteristic. It is a creative decision about what deserves the viewer's attention.
How Aperture Controls Depth of Field
Aperture is one of the primary ways photographers control depth of field.
It describes the opening inside a lens that allows light to reach the camera sensor. Aperture is measured in f-stops, such as f/1.8, f/2.8, f/5.6, and f/11.
The important distinction is:
A smaller f-number means a wider aperture and shallower depth of field.
A larger f-number means a narrower aperture and deeper depth of field.
Wide Apertures: Smaller f-Numbers
Examples include:
f/1.4
f/1.8
f/2
f/2.8
Wide apertures allow more light into the camera and can create a shallow depth of field. They are particularly useful when you want to separate a subject from its surroundings.
Common applications include:
Portrait photography
Concert and event photography
Wildlife photography
Weddings
Low-light photography
Creative detail photography
For example, photographing a singer at f/1.8 can keep the performer's face sharp while turning distant stage lights into soft circles of color.
A wide aperture also helps in low-light situations because it allows you to use a faster shutter speed or a lower ISO than you might otherwise need.
Narrow Apertures: Larger f-Numbers
Examples include:
f/8
f/11
f/16
Narrower apertures increase depth of field, making more of the scene appear sharp.
Common applications include:
Landscape photography
Architecture
Cityscapes
Environmental photography
Group photographs
For example, a landscape photographed at f/11 can keep foreground details and distant scenery acceptably sharp when the focus distance is chosen carefully.
However, using the smallest available aperture is not always the best approach. Very narrow apertures, such as f/22, can reduce fine detail through diffraction. For many lenses, f/8 or f/11 provides a useful balance between depth of field and overall sharpness.
Three Main Factors That Affect Depth of Field
Aperture is important, but it is not the only factor. Focal length and focusing distance also influence how much of an image appears sharp.
1. Aperture
As discussed above, wider apertures create shallower depth of field, while narrower apertures create deeper depth of field.
For example:
f/1.8 creates a relatively shallow focus area.
f/5.6 provides more depth of field.
f/11 generally keeps a larger range of distances acceptably sharp.
The exact result depends on your lens, focal length, focusing distance, and intended framing.
2. Focal Length
Focal length influences framing and the appearance of background blur.
When you photograph a subject from the same position, changing to a longer focal length magnifies the subject and makes the background appear larger. This can make background details look more prominent and blurred.
When you change your position to maintain the same subject framing, a longer focal length can also produce stronger background separation, depending on the aperture and background distance.
This is one reason portrait and wildlife photographers often use longer lenses.
Examples include:
A 24mm lens for wide environmental scenes
An 85mm lens for portraits and subject isolation
A 200mm lens for distant subjects and tighter compositions
Focal length does not work independently of the other factors. The aperture, subject distance, and background placement all contribute to the final result.
3. Distance From Your Subject
Focusing distance has a significant effect on depth of field.
The closer you focus, the shallower the depth of field becomes. This is especially noticeable in macro photography, where even small changes in camera position can affect how much of a subject remains sharp.
For example, a flower photographed from very close range may have only a small portion of its petals in focus. Photographing the same flower from farther away generally increases the depth of field.
The distance between your subject and the background matters too. Increasing that separation can make the background appear more blurred, particularly when using a wide aperture.
Shallow vs Deep Depth of Field
Both shallow and deep depth of field have their place. The right choice depends on the subject, environment, and story you want to communicate.
Shallow Depth of Field
Shallow depth of field is useful when you want to emphasize one subject or detail while reducing the visual importance of everything around it.
Common uses include:
Portraits
Concerts
Wildlife
Macro photography
Product and detail photography
Its advantages include:
Separating the subject from the background
Reducing distracting details
Directing attention toward a specific area
Creating a sense of depth and atmosphere
Typical starting points include f/1.4 to f/2.8, depending on the lens and shooting conditions.
Deep Depth of Field
Deep depth of field is useful when more of the scene contributes to the photograph.
Common uses include:
Landscapes
Architecture
Cityscapes
Environmental portraits
Group photography
Its advantages include:
Keeping more of the scene acceptably sharp
Showing relationships between foreground and background
Preserving environmental detail
Giving viewers more of the scene to explore
Apertures around f/8 to f/11 are common starting points for landscape photography, although the best setting depends on the composition and focusing distance.
Shallow vs. Deep Depth of Field at a Glance
| Feature | Shallow Depth of Field | Deep Depth of Field |
|---|---|---|
| Aperture | Wide, smaller f-number | Narrow, larger f-number |
| Focus area | Smaller range appears sharp | Larger range appears sharp |
| Background | More pronounced blur | More detail remains visible |
| Common uses | Portraits, concerts, wildlife, macro | Landscapes, architecture, groups |
| Creative effect | Emphasizes the subject | Shows more of the environment |
Shallow Depth of Field
Aperture: Wide, smaller f-number
Focus area: Smaller range appears sharp
Background: More pronounced blur
Common uses: Portraits, concerts, wildlife, macro
Creative effect: Emphasizes the subject
Deep Depth of Field
Aperture: Narrow, larger f-number
Focus area: Larger range appears sharp
Background: More detail remains visible
Common uses: Landscapes, architecture, groups
Creative effect: Shows more of the environment
Understanding Bokeh in Photography
Bokeh describes the appearance and quality of the out-of-focus areas in a photograph.
It is often associated with the soft background blur created by wide apertures, particularly when photographing distant lights or bright highlights.
The distinction is important:
Depth of field describes how much of the image appears acceptably sharp.
Bokeh describes the visual character of the areas outside that focus range.
Good bokeh is often associated with smooth, pleasing transitions between focused and unfocused areas. Out-of-focus highlights may appear as soft circles or other shapes, depending on the lens and aperture.
Bokeh is especially noticeable when photographing subjects against:
City lights at night
Stage lighting
Sunlight filtering through trees
Reflections on water
Distant decorative lights
Bright highlights in the background
A portrait photographed with a wide aperture may transform background lights into soft glowing circles. In concert photography, colorful stage lighting can become an atmospheric backdrop behind a sharply focused performer.
However, attractive bokeh is not simply about making the background as blurry as possible. The quality of the blur matters, and it should support the subject rather than compete with it.
What Makes Good Bokeh?
Several factors influence how out-of-focus areas look in a photograph.
Lens Design
The optical design of a lens affects its bokeh characteristics. Different lenses can render out-of-focus highlights and background details differently, even when used at the same aperture.
Some lenses produce smooth, gradual transitions, while others may create more pronounced edges, unusual shapes, or distracting patterns in the blur.
A wide maximum aperture gives you more flexibility to create shallow depth of field, but it does not automatically guarantee attractive bokeh.
Aperture Blade Shape
The number and shape of the aperture blades influence the appearance of out-of-focus highlights.
Rounded aperture blades can produce more circular highlights, particularly when the lens is stopped down. Lenses with fewer or less-rounded blades may produce more angular shapes.
This is especially noticeable when photographing small points of light, such as string lights, streetlights, and concert lighting.
Background Distance and Detail
The background itself has a major influence on the appearance of bokeh.
A distant background with small points of light can create attractive, soft highlights. A busy background with branches, signs, or bright objects may remain visually distracting even when blurred.
Moving your subject farther away from the background can help create stronger separation and smoother-looking backgrounds.
Aperture
A wider aperture generally creates larger areas of blur and more pronounced out-of-focus highlights.
Stopping down slightly increases depth of field and changes the appearance of those highlights. Depending on the lens, the shape and character of the bokeh may also change.
How to Create Better Background Blur
Creating stronger background blur involves more than simply selecting the widest aperture available. Your position, lens choice, and background all contribute.
1. Use a Wider Aperture
Opening the aperture is one of the most direct ways to reduce depth of field.
Settings such as f/1.4, f/1.8, and f/2.8 are common choices when you want to separate a subject from its surroundings.
Keep in mind that extremely wide apertures can make focusing more demanding. If the subject moves or the focus point is slightly off, important details may appear soft.
2. Move Closer to Your Subject
Focusing closer generally reduces depth of field.
This is particularly useful for portraits, flowers, instruments, and other subjects where you want to emphasize a specific detail.
Be mindful of your lens's minimum focusing distance. Moving too close can prevent the lens from focusing properly.
3. Increase Subject-to-Background Separation
One of the easiest ways to improve background blur is to change the relationship between your subject and the background.
If possible, position your subject farther away from walls, trees, or other background elements.
A person standing several feet in front of a distant background will generally appear more separated than someone standing directly against a wall.
4. Choose an Appropriate Focal Length
Longer lenses can help create stronger-looking background separation, particularly when you maintain similar subject framing.
Portrait photographers often use lenses such as 85mm or 135mm, while wildlife and sports photographers may use much longer focal lengths.
The best choice depends on the available space, subject distance, and composition.
5. Look for Background Highlights
Small points of light can create attractive bokeh when they fall outside the focus area.
Look for:
String lights
Distant streetlights
Reflections
Sunlight passing through leaves
Stage lighting
Decorative lighting
Pay attention to where these highlights appear in the frame. A few well-placed points of light can add atmosphere, while too many can become distracting.
Best Aperture Settings for Different Photography Styles
There is no single correct aperture for every photograph. The best setting depends on how much of the scene you want in focus, how much light is available, and how your subject is moving.
These are useful starting points rather than fixed rules.
Portrait Photography
Portrait photographers often use shallow depth of field to emphasize facial expressions and separate a person from the background.
Common starting apertures: f/1.4 to f/2.8
A wide aperture can create a soft background and draw attention toward the subject's eyes.
However, extremely wide apertures can make focusing difficult, especially when photographing people at close distances. At f/1.4, for example, one eye may be sharp while the other appears soft if the subject is turned at an angle.
A slightly narrower setting, such as f/2 or f/2.8, can provide more depth of field while still creating attractive background blur.
Concert Photography
Concert photographers often work in difficult lighting conditions, making wide apertures especially useful.
Common starting apertures: f/1.8 to f/2.8
A wide aperture helps gather more light, allowing faster shutter speeds to freeze movement or lower ISO settings when conditions permit.
It can also help isolate a performer against stage lighting, instruments, and other background elements.
However, using the widest aperture is not always ideal. Performers move quickly, and a very shallow focus area can make it difficult to keep their faces and eyes sharp.
For more practical guidance, see the Best Camera Settings for Concert Photography guide.
Landscape Photography
Landscape photographers generally want a larger range of the scene to appear sharp.
Common starting apertures: f/8 to f/11
These settings often provide a good balance between depth of field and lens sharpness.
For scenes with close foreground elements and distant backgrounds, focus placement becomes especially important. Techniques such as hyperfocal focusing and focus stacking can help when a single exposure does not provide enough depth of field.
Stopping down too far can introduce diffraction, so f/16 or f/22 should be used when the additional depth of field is worth the potential loss of fine detail.
For more landscape-specific advice, explore the Best Lenses for Landscape Photography guide.
Macro Photography
Macro photography often produces extremely shallow depth of field because the camera focuses at very close distances.
Common starting apertures: f/8 to f/16
A narrower aperture can help keep more of a small subject in focus, but the effective depth of field may still be very limited.
Macro photographers often need to balance sharpness, light, and background separation. Focus stacking can be useful when a single exposure cannot keep the desired amount of the subject sharp.
Wildlife Photography
Wildlife photographers often use shallow depth of field to separate animals from busy natural environments.
Common starting apertures: f/2.8 to f/5.6
A wide aperture can help isolate an animal and allow faster shutter speeds, which are important when photographing movement.
Long telephoto lenses also make it easier to create subject separation from a distance.
However, the subject still needs enough depth of field to keep important details sharp. For animals facing the camera at an angle, stopping down slightly may help keep both eyes in focus.
Depth of Field in Real-World Photography
The best way to understand depth of field is to consider how it changes the appearance and purpose of different photographs.
Concert and Live Music Photography
Concert photography often benefits from shallow depth of field.
A performer may be surrounded by colorful stage lights, instruments, other musicians, and distracting background elements. Using a wide aperture can help isolate the main subject while turning distant lights into soft shapes and colors.
For example, a vocalist photographed at f/1.8 may have their face in focus while the stage lighting behind them becomes blurred.
This can create a stronger visual connection with the performer and simplify a busy stage environment.
Depth of field is also a practical tool in low light. A wider aperture allows more light to reach the sensor, helping maintain faster shutter speeds when performers are moving.
Portrait Photography
Portrait photography is another common application of shallow depth of field.
A blurred background can reduce distractions while preserving enough environmental detail to give the photograph a sense of place.
For example, a musician photographed backstage may stand out clearly while the surrounding venue becomes a soft background.
The amount of blur should support the portrait. If the background provides useful context, retaining some detail may create a stronger image than eliminating it entirely.
Detail and Product Photography
Shallow depth of field can help emphasize small details, textures, and objects.
Examples include:
Guitar strings and instrument details
Flowers and plants
Food photography
Jewelry and products
Textures and small objects
A close-up photograph of a guitar may emphasize the strings or wood grain while allowing the rest of the instrument to fall gradually out of focus.
The key is choosing the detail that should attract the viewer's attention and placing the focus carefully.
Landscape Photography
Landscape photography often benefits from deeper depth of field because the foreground, middle ground, and background all contribute to the composition.
A photograph might include foreground rocks, trees, water, distant mountains, and sky. Using an appropriate aperture and focus distance helps preserve detail across the scene.
Apertures such as f/8 and f/11 are common starting points, but the focus distance and subject placement are just as important.
For particularly challenging scenes, focus stacking can combine multiple photographs focused at different distances.
Architecture and City Photography
Architecture and city photography often benefit from keeping a large portion of the scene sharp.
Building details, surrounding structures, leading lines, and the environment can all contribute to the photograph.
A deeper depth of field helps viewers explore the entire composition rather than concentrating on only one area.
Does Sensor Size Affect Depth of Field?
Sensor size can influence how much depth of field you achieve for a given composition.
When comparing cameras using the same framing and perspective, a full-frame camera generally makes it easier to achieve shallower depth of field than an APS-C camera. This is because the full-frame camera can use a longer focal length or a closer shooting position to produce an equivalent composition.
For example, an APS-C camera typically requires a shorter focal length than a full-frame camera to achieve a similar field of view from the same position. That difference can affect the resulting depth of field.
However, sensor size does not determine depth of field on its own. Aperture, focal length, focusing distance, and background placement all matter.
APS-C cameras can produce beautiful background blur, particularly when paired with fast lenses and used at suitable focusing distances. Full-frame cameras simply provide more flexibility when very shallow depth of field is the goal.
The best camera format depends on your needs, lenses, budget, and shooting style.
How Lens Choice Affects Bokeh
Your lens has a major influence on the appearance of background blur.
Different lenses can produce noticeably different bokeh, even when their focal lengths and maximum apertures are similar.
Prime Lenses
Prime lenses have a fixed focal length and are popular for their wide maximum apertures and subject-isolation capabilities.
Common examples include:
35mm f/1.8
50mm f/1.8
85mm f/1.8
135mm f/1.8
These lenses are useful for portraits, concerts, detail photography, and other situations where shallow depth of field is desirable.
A wide maximum aperture gives you the option to work in low light and create stronger background separation when needed.
Telephoto Lenses
Telephoto lenses are useful when you want to isolate a subject from a distance.
Common examples include:
70–200mm
100–400mm
180–600mm
They are popular for wildlife, sports, and concert photography because they allow photographers to frame distant subjects tightly.
When used with appropriate subject and background distances, telephoto lenses can create strong background separation and make distracting elements less prominent.
Wide-Angle Lenses
Wide-angle lenses are often used when the environment is an important part of the photograph.
Common examples include:
14–24mm
16–35mm
24mm prime
They are particularly useful for landscapes, architecture, and environmental portraits.
Wide-angle lenses can still produce shallow depth of field when focusing close to a subject, especially with a wide aperture. However, they are often used in ways that emphasize more of the surrounding scene.
Common Depth of Field Mistakes
Depth of field is a creative tool, but a few common mistakes can make photographs less effective.
1. Using the Widest Aperture for Every Photograph
A wide aperture can create attractive background blur, but it is not always the best choice.
At f/1.4 or f/1.8, the focus area can be extremely shallow. Important details may become soft if the subject moves or the focus point is slightly off.
Sometimes stopping down to f/2.8 or f/4 produces a stronger photograph while retaining enough background separation.
2. Ignoring Background Distance
A wide aperture does not guarantee a clean background.
If your subject is standing directly in front of a wall or busy backdrop, distracting shapes may remain visible even when blurred.
Whenever possible, increase the distance between your subject and the background.
3. Focusing on the Wrong Area
A shallow depth of field makes accurate focusing especially important.
For portraits, prioritize the eyes. For wildlife, focus on the eye closest to the camera when possible. For macro photography, identify the most important detail before taking the photograph.
Even an attractive background cannot compensate for an important subject that is out of focus.
4. Stopping Down Too Far
Using a very narrow aperture can increase depth of field, but it can also reduce fine detail through diffraction.
Rather than automatically choosing f/16 or f/22, consider whether f/8 or f/11 provides enough depth of field for the composition.
5. Letting Background Blur Replace Good Composition
Blur should support the photograph, not become the entire purpose of it.
A strong image still depends on lighting, framing, subject placement, and meaningful content. Pay attention to what remains visible in the background, even when it is out of focus.
Practical Tips for Controlling Focus and Blur
Once you understand the relationship between aperture, focal length, and distance, controlling depth of field becomes much more intuitive.
Keep these points in mind:
Use a wide aperture when you want to isolate a subject or create a soft background.
Use a narrower aperture when more of the scene needs to remain sharp.
Pay attention to subject distance. Focusing closer generally produces shallower depth of field.
Create more background separation by moving your subject farther away from distracting elements.
Choose your focal length intentionally. Longer lenses can help create stronger-looking subject separation when used with suitable framing and distances.
Focus on the most important detail. For portraits, that usually means the eyes.
Do not chase blur unnecessarily. Sometimes a little more background detail helps tell a stronger story.
Watch for diffraction. Very narrow apertures can reduce fine detail, even though they increase depth of field.
Depth of field and bokeh are not simply technical concepts. They are creative tools that help determine how a photograph looks and what the viewer notices first.
For concert and event photographers, understanding depth of field helps isolate performers while working in difficult lighting. For landscape photographers, it helps balance foreground interest with distant detail.
The goal is not to create the blurriest possible background or keep every part of every image sharp. It is to choose the amount of focus and blur that best supports the photograph.
Frequently Asked Questions
What is depth of field in photography?
Depth of field is the range of distances in a photograph that appears acceptably sharp in front of and behind the point of focus. A shallow depth of field keeps a smaller area sharp, while a deep depth of field keeps a larger portion of the scene in focus.
What aperture creates the most background blur?
Wide apertures with smaller f-numbers, such as f/1.4, f/1.8, and f/2.8, can create strong background blur. The result also depends on focal length, focusing distance, and how far the subject is from the background.
What is the difference between depth of field and bokeh?
Depth of field describes how much of an image appears acceptably sharp. Bokeh describes the appearance and quality of the out-of-focus areas. They are related, but they are not the same thing.
What lenses are best for creating bokeh?
Lenses with wide maximum apertures, such as 50mm f/1.8 and 85mm f/1.8 primes, are popular choices for creating background blur. Lens design also affects the appearance of bokeh, so two lenses with similar specifications can produce different results.
What is the best aperture for landscape photography?
Many landscape photographers use f/8 to f/11 because these settings provide a useful balance between depth of field and overall sharpness. The best aperture depends on the scene, focusing distance, and how much of the foreground and background needs to remain sharp.
Why is my background not blurry even at f/1.8?
Several factors can affect background blur. Your subject may be too close to the background, you may be using a relatively wide focal length, or you may be photographing from farther away than necessary. Try increasing subject-to-background distance, moving closer when appropriate, or using a longer focal length.
Can APS-C cameras create good background blur?
Yes. APS-C cameras can create attractive background blur, particularly when paired with fast lenses. Full-frame cameras generally make very shallow depth of field easier to achieve for an equivalent composition, but lens choice, aperture, and shooting distance are important with either sensor format.
Is a wider aperture always better for portraits?
No. A wide aperture can create pleasing background separation, but an extremely shallow focus area can make it difficult to keep both eyes or the entire face sharp. Apertures such as f/2 or f/2.8 can provide a useful balance between subject separation and reliable focus.
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