What Is Depth of Field? A Filmmaker’s Guide with Examples

Key Takeaways

• Depth of field describes the area in front of and behind the focus point that appears acceptably sharp, controlling how much of the image the audience can see at once and directing their attention within the frame
• Depth of field is determined by four key factors working together: aperture (f-stops), focal length (lens type), distance from subject, and sensor size. Each can be adjusted to achieve the desired visual effect
• Shallow depth of field isolates subjects and creates intimacy; deep depth of field reveals environmental context and relationships

Introduction

A character stands in the foreground while the city behind them melts into soft color. In another scene, every face at a crowded dinner table remains sharply visible. Both images are making a choice about depth of field.

Depth of field is one of cinematography’s most useful storytelling tools because it controls how much of the image appears acceptably sharp. It can direct attention, reveal relationships, create tension or help an audience understand a complicated space.

It’s also one of those filmmaking terms that can sound more technical than it needs to be. Once you understand the main factors behind it, depth of field becomes much easier to plan and use intentionally. When you internalize how aperture, focal length, subject distance, and sensor size work together, you gain the ability to direct viewer attention and evoke emotion through focus. 

In today’s blog, we’ll explore what depth of field means, what affects it and how filmmakers use it to shape a story. We’ll also show you how to plan depth of field decisions using shot lists and storyboards to communicate focus choices to your cinematography team before production begins. 

Let’s get going!

What Is Depth of Field?

Depth of field describes the area in front of and behind the focus point that appears acceptably sharp.

Imagine filming a character sitting at a kitchen table. If only their face is sharp while the room behind them looks blurred, you’re using a shallow depth of field. If the character, the table and the background are all clearly visible, you’re using a deeper depth of field.

The important word here is “acceptably.” A lens only focuses perfectly at one precise distance, but objects around that point can still look sharp enough to the human eye.

I must point out that depth of field isn’t the same as focus. Focus tells you where the sharpest point is while depth of field tells you how much space around that point also appears clear. Filmmakers use that space to control what the audience notices.

A shallow image can isolate a character from the world around them, and a deep image can encourage viewers to study several layers of action at once. It’s how you set the level of intimacy in a story or how you direct where the audience should be putting their focus in the frame.

What Affects Depth of Field?

Several factors influence how much of the image appears sharp. They work together, so changing one may require you to adjust the others.

Aperture

Aperture refers to the opening inside the lens that allows light to reach the camera sensor. It’s measured in f-stops. A wider aperture, such as f/1.8 or f/2.8, creates a shallower depth of field. A narrower aperture, such as f/8 or f/11, creates a deeper depth of field.

The numbering can feel backward at first. A smaller f-stop number means a wider opening, while a larger number means a smaller opening.

Opening the aperture can help blur the background, but it also allows more light into the camera. Closing it increases depth of field but reduces exposure, so you may need more light, a higher ISO or a slower shutter speed. Keep in mind that opening up your aperture also lets in more light, so on a bright day you may need an ND filter to shoot wide open without overexposing. 

Focal Length

Longer lenses usually create a shallower-looking depth of field than wider lenses when framing the subject in a similar way.

A telephoto lens can compress the background and make it appear softer and closer to the subject. A wide-angle lens tends to show more of the environment and makes it easier to keep several planes in focus.

That’s one reason filmmakers often use longer lenses for intimate close-ups and wider lenses for scenes where the location matters. However, focal length doesn’t work alone. Camera distance and framing also affect the result.

Distance From the Subject

The closer the camera is to the subject, the shallower the depth of field becomes.

Move a camera close to someone’s eye, and it may be difficult to keep both eyes sharp. Move farther away, and more of the person and their surroundings may fall within the acceptable focus range.

The subject’s distance from the background matters too. A character standing far from a wall will usually be easier to separate through blur than someone standing directly against it.

Sensor Size

Larger camera sensors generally make it easier to create a shallow depth of field when compared with smaller sensors at a similar field of view.

That’s one reason full-frame cameras are often associated with soft backgrounds and strong subject separation. Smaller sensors can still produce shallow focus, especially with a wide aperture and close subject distance, but the setup may need more careful planning.

Sensor size shouldn’t be treated as a measure of image quality on its own; it’s simply one part of the visual system.

Focus Distance

Where you place focus also affects how depth is distributed. More of the acceptable focus area usually extends behind the focus point than in front of it, although the exact balance changes depending on the lens, aperture and distance.

For wide shots and landscapes, cinematographers may use hyperfocal distance: a focus setting that maximizes how much of the scene remains sharp from near to far.

You don’t need to calculate it manually for every shot, but it’s useful when you want a large environment to stay readable.

Shallow vs Deep Depth of Field

Neither approach is automatically more cinematic. The right choice depends on what the scene needs.

Shallow Depth of Field

A shallow depth of field keeps a narrow area sharp while allowing the foreground or background to blur.

Filmmakers often use it to:

• Isolate a character
• Direct attention to a small detail
• Hide distracting backgrounds
• Create intimacy
• Suggest emotional separation
• Build suspense by obscuring information
• Shift attention through a focus pull

A close-up with soft surroundings can make the audience feel locked into the character’s experience. The world beyond them becomes less important or less accessible.

Shallow focus can also create mystery. A blurred figure in the background may feel threatening because the audience can’t identify them clearly.

However, it can become restrictive. If an actor moves unexpectedly or misses a precise mark, they may fall out of focus. That can make shallow depth of field harder to manage during handheld shots, stunts or improvisation. Cinematographers often use focus charts and rehearsal shots to maintain accuracy under tight shooting schedules. 

Deep Depth of Field

A deep depth of field keeps more of the foreground, middle ground and background sharp. Filmmakers use it to:

• Show relationships between characters and spaces
• Stage several actions within one frame
• Give the audience freedom to look around
• Create visual complexity
• Reveal threats or information in the background
• Emphasize isolation within a large environment
• Reduce the need for frequent cuts

Deep focus can make the frame feel active and layered. A conversation may happen in the foreground while another important action develops behind it.

It’s especially useful when the location carries narrative meaning. Instead of separating the character from their surroundings, the shot connects them to the wider world.

Deep depth of field often requires more light because the lens needs to be stopped down. It may also make clutter and background details more noticeable, so production design and blocking become even more important. Use mise en scène planning alongside deep focus choices to ensure all visible elements support your visual storytelling. 

Famous Film Examples

Depth of field has shaped some of cinema’s most memorable images.

Citizen Kane (1941)

Citizen Kane is frequently associated with deep-focus cinematography. In many scenes, characters and important actions remain visible across several planes of the frame. The audience can watch what’s happening in the foreground while also reading events in the distance.

This approach supports the film’s interest in power, memory and emotional distance. Characters may occupy the same room but feel separated by architecture, status or experience.

Jaws (1975)

Steven Spielberg uses depth and staging brilliantly in Jaws. Beach scenes often keep several areas of action readable at once, allowing the audience to scan the water, the swimmers and Chief Brody’s reactions. The visual depth helps create anxiety because danger could emerge anywhere within the frame.

The film also uses focus and framing to control exactly when the audience notices a threat.

The Graduate (1967)

The Graduate uses selective focus to reinforce Benjamin’s isolation and uncertainty.

Backgrounds often become soft or visually overwhelming, leaving him detached from the social world around him. Depth of field supports the film’s emotional perspective rather than simply making the image look attractive.

Moonlight (2016)

Moonlight often uses shallow focus to create intimacy and emotional vulnerability.

Faces are isolated from their surroundings, helping the audience concentrate on small expressions and moments of hesitation. The softness around the characters reflects the film’s deeply personal perspective.

Choosing the Right Depth of Field

Depth of field should begin with the story, not the equipment.

Before choosing a lens or aperture, ask what the audience needs from the shot.

What Should They Notice?

If one expression or object matters most, shallow focus may help direct attention. If several characters or actions need to be understood at once, deeper focus could be more effective.

How Should the Scene Feel?

• Shallow depth of field can feel intimate, romantic, uncertain or claustrophobic.
• Deep depth of field can feel observational, energetic, exposed or expansive.

These aren’t fixed rules, though. A shallow image can feel threatening, while a deep image can make a character look painfully alone.

Does the Location Matter?

If the environment tells part of the story, don’t blur it automatically. A cramped flat, busy hospital or empty factory may reveal just as much as the actor’s face. Keeping the space visible can strengthen the scene. Storyboards are a great way to visualize how environmental details support your depth of field choices. 

How Much Will the Actors Move?

Extremely shallow focus may be difficult during unpredictable movement.

If the performers need freedom, you may want more depth so they can move naturally without constantly missing their focus marks.

What Can the Production Support?

A deep focus shot may require more lighting. A shallow shot may need a skilled focus puller. Choose an approach that fits the schedule, crew and equipment rather than forcing a technically demanding look onto every scene.

Common Depth of Field Mistakes

Using Shallow Focus for Everything

Soft backgrounds can look polished, but they shouldn’t become the default. If every shot isolates the subject, the location may lose meaning and scenes may begin to feel visually repetitive.

Ignoring Performance and Blocking

A beautiful focus plane isn’t useful if the actor can’t move naturally. Plan depth of field alongside blocking so the performance doesn’t feel restricted by the camera setup.

Forgetting the Background

Even when it’s blurred, the background still matters. Bright highlights, strong shapes or movement can pull attention away from the subject. Always check the whole frame.

Missing Focus Without Intention

A soft image isn’t automatically artistic. If the audience’s attention is meant to be on a character’s eyes, those eyes usually need to be sharp. Check focus carefully, especially during close-ups and low-light scenes.

Choosing Aperture Without Considering Exposure

Changing the aperture affects both depth of field and brightness. If you stop down the lens to gain more focus, you’ll need to compensate through lighting, ISO, shutter speed or neutral density choices.

Overusing Focus Pulls

A rack focus can guide attention from one subject to another, but it loses impact when used constantly. Only use it when the shift itself has dramatic meaning.

FAQs

Keep reading on the Celtx blog:

• How to Create a Shot List: The Ultimate Guide for Directors & Cinematographers
• Storyboard vs Shot List? Actually, You Need Both
• What Is a Cinematographer and What Do They Do?

Conclusion

Depth of field is a way of deciding how much of the story the audience can see at once. Shallow focus can isolate a face, hide information or create intimacy, while deep focus can reveal relationships, build tension across a space and let viewers explore the frame.

The most effective choice won’t always be the most dramatic one. It’ll be the one that supports the scene.

Start by asking what matters most in the shot, where the audience should look and how the environment affects the character. Then use aperture, lenses, distance and focus to create that experience. Plan your depth of field decisions in pre-production using shot lists that document your aperture, focal length, and focus pull choices so your director of photography can prepare and rehearse before the camera rolls.