Shallow vs deep depth of field is one of the first choices photographers and filmmakers make for every shot. This guide explains what each one is, how aperture, focal length and distance affect them, and when to use each.
What Is Depth of Field?
Depth of field (DoF) is the zone of an image that appears acceptably sharp. It extends in front of and behind the point you focus on, and its size changes with the lens aperture, the focal length, and the distance between the camera and the subject.
When this zone is thin, the image has a shallow depth of field. When it covers most of the frame, the image has a deep depth of field. Knowing how to control both gives you more creative freedom in photos and video.
What Is Shallow Depth of Field?
Shallow depth of field means only a narrow plane of the image is in sharp focus, so the subject stands out against a blurred foreground and background. It is used to isolate subjects in the frame and is common in wedding portraits, macro shots, interviews and detail-oriented images.
What Is Deep Depth of Field?
Deep depth of field means the zone of sharpness extends across most of the frame, so elements from the foreground to the background appear in focus. It is preferred in landscape and architecture photography, and in film scenes where context and detail in the environment matter.
Shallow vs Deep Depth of Field: Side-by-Side Comparison
| Factor | Shallow depth of field | Deep depth of field |
|---|---|---|
| What stays sharp | A thin slice around the subject | Most of the frame, foreground to background |
| Aperture | Wide (small f-number, e.g. f/1.4–f/2.8) | Narrow (large f-number, e.g. f/8–f/16) |
| Focal length | Longer focal lengths increase background blur | Wider focal lengths keep more in focus |
| Subject distance | Close to the subject | Farther from the subject |
| Sensor size (same framing) | Larger sensors give shallower DoF | Smaller sensors give deeper DoF |
| Background | Soft blur (bokeh) | Detailed and readable |
| Typical uses | Portraits, interviews, macro, product details | Landscapes, architecture, street, group shots |
| Storytelling effect | Directs attention to one subject | Lets the viewer explore the whole scene |
Aperture: A wide aperture (small f-number such as f/1.8) gives a shallow depth of field, while a narrow aperture (large f-number such as f/11) gives a deep depth of field.
Focal length: At the same aperture and distance, longer focal lengths make the background blur stronger, while wider focal lengths keep more of the scene sharp.
Distance: The closer you are to the subject, the shallower the depth of field. Moving farther away increases the area in focus.
Background: Shallow depth of field creates soft background blur, or bokeh, which removes distractions and isolates the subject. Deep depth of field keeps background details readable.
Storytelling: Shallow depth of field pulls the viewer's attention to one subject and creates a closer connection with it. Deep depth of field spreads attention across the frame and creates an immersive sense of place.
When Should You Use Shallow or Deep Depth of Field?
Use a shallow depth of field when you want the viewer's attention on a specific subject. Macro, portrait and close-up shots usually benefit from it. Use a deep depth of field when the whole scene matters, as in landscape, street and architectural photography.
How much detail is preserved across a deep depth of field depends on the lens optics, and the same applies to the quality of bokeh in images with a shallow depth of field.
How Does an Anamorphic Lens Render Depth of Field?
Any lens can create both shallow and deep depth of field, but lenses differ in how they render sharpness and blur. Anamorphic lenses add a distinct character: out-of-focus highlights become oval bokeh, and bright light sources produce horizontal flares.
The SIRUI Saturn full-frame anamorphic series opens to T2.9, a T-stop that reflects the actual light transmitted through the lens. At T2.9, the lenses give a soft, oval background blur for portraits and interviews. Stopping down to T8 or T11 on the 35mm lens and stepping back from the subject keeps most of the scene in focus for wide shots, which de-squeeze to a widescreen 2.39:1 frame. The newer SIRUI Saturn V2 keeps the 1.6x squeeze and T2.9–T16 range and adds a mechanism for switching between horizontal and vertical shooting.
For practical techniques, see our guide on 4 easy tips to get perfect shots with shallow depth of field.
Final Thoughts
Shallow and deep depth of field each serve a different purpose. Shallow depth of field isolates the subject, while deep depth of field keeps the whole scene readable. Aperture, focal length, subject distance and sensor size all work together to decide which one you get. An anamorphic lens such as the SIRUI Saturn series adds oval bokeh and horizontal flares to both looks.
FAQ
What is shallow depth of field?
Shallow depth of field means only a thin area around the subject is in sharp focus, while the foreground and background appear blurred. It is commonly used in portraits, interviews and product shots to separate the subject from its surroundings.
What aperture gives a shallow depth of field?
Wide apertures with small f-numbers, such as f/1.2 to f/2.8, produce a shallow depth of field. Standing closer to the subject and using a longer focal length will make the background blur stronger at the same aperture.
What aperture gives a deep depth of field?
Narrow apertures with larger f-numbers, typically f/8 to f/16, produce a deep depth of field. Combined with a wider focal length and a greater subject distance, most of the frame from foreground to background will appear sharp.
Does focal length affect depth of field?
Yes. At the same aperture and subject distance, a longer focal length gives a shallower depth of field and a stronger background blur. A wider focal length keeps more of the scene in focus, which is why landscape photographers often use wide lenses.
Does sensor size affect depth of field?
Yes. When framing the same shot at the same aperture, a larger sensor gives a shallower depth of field than a smaller one. This is one reason full-frame cameras are popular for portraits and cinematic video with soft backgrounds.
What is the difference between bokeh and depth of field?
Depth of field describes how much of the image is in focus. Bokeh describes the look of the out-of-focus areas, such as how smooth the blur is and the shape of light points. Anamorphic lenses, for example, render oval bokeh.
