Aren't bokeh and depth of field the same thing?

No, and that's the most common confusion. [Depth of field](/glossary/profondeur-de-champ) is a geometric measurement: it describes the extent of the zone that appears sharp in front of and behind the focal plane. Bokeh, on the other hand, describes the *quality* of what lies outside that zone — the texture of the blur, the roundness of the highlight bubbles, the softness of the transitions. Two lenses can produce exactly the same depth of field and radically different bokeh. One will be creamy and fluid, the other busy and ringed. Depth of field is physical, bokeh is aesthetic.

How do I get bokeh with a smartphone?

Smartphone sensors are too small to produce real optical bokeh: the depth of field is intrinsically enormous. Three solutions exist. *Portrait mode*, which simulates the blur computationally (effective on simple edges, hopeless on hair and glasses). *The distance trick*: get within twenty centimeters of the subject with a very distant background — you'll get genuine, modest blur. *Clip-on add-on lenses* with a wide aperture, which produce real optical bokeh. No software simulation yet matches the signature of a dedicated lens, but portrait modes are improving fast.

Does bokeh work for Reels and vertical formats?

Yes, and it actually becomes a differentiating asset there. In vertical, the subject occupies more frame height and the background is more present than in landscape. Controlled bokeh instantly separates the subject from the setting — crucial in a feed scrolling at speed. Favor 50 mm or 85 mm equivalent focal lengths, wide open, with a background at least two meters away. Avoid "swirly" bokeh that's too pronounced in video: it spins with every camera move and tires the eye. Creamy, neutral bokeh gives a cinematic feel without competing with the narrative.

EXIF Data

Bokeh

Bokeh isn't the amount of blur, it's its quality — the texture, the roundness, the softness of what falls out of focus.

Photo : Sebastian Pichler / Unsplash

Definition

What is bokeh?

Bokeh describes the aesthetic quality of the background blur produced by a lens. It's a qualitative notion, not to be confused with depth of field, which measures the amount of the sharp zone. Two lenses can produce the same depth of field and a radically different bokeh.

The word comes from the Japanese ボケ ("boke"), meaning blur or haze. It was popularized in the West in 1997 by Mike Johnston, then editor of Photo Techniques magazine (May-June 1997 issue), who added a final "h" to guide the English pronunciation. Since then it has shaped photographers' vocabulary.

Several families exist. Creamy bokeh — fluid, with no hard edge — is the signature of high-end glass like the Zeiss Planar or the Voigtländer Nokton. Nervous, busy, ringed bokeh often gives away cheap optics. Swirly, whirling bokeh is emblematic of vintage Petzval lenses and the famous Soviet Helios 44-2.

The shape of the highlight bubbles depends directly on the number of aperture blades: eight blades give octagons, eleven or more approach a perfect circle. Wide open, the bubbles are round; as you stop down, they reveal the geometry of the diaphragm.

Example

In practice

Three concrete scenarios to understand how bokeh is built — and why depth of field alone isn't enough to describe it.

Portrait at 85 mm f/1.4. You shoot a face two meters away, with the background six meters behind. That distance between subject and background is the main ingredient: the larger it is, the more the background melts into colored washes. Wide open, the leaves of a tree behind the model become a continuous green sheet, with no identifiable edge. The face itself stays chiseled. That's the definition of "creamy" bokeh.

Christmas tree in the background, 50 mm f/2. Frame a portrait with the fairy lights three meters behind the subject. Each bulb becomes a bubble of light — its shape reveals the geometry of your aperture. At f/1.4, perfectly round bubbles; at f/4, polygons start to appear. It's the ideal exercise for judging a lens.

Bokeh ring with a 500 mm f/8 mirror lens. These catadioptric telephotos produce ring-shaped bubbles (a donut), because the secondary mirror obstructs the center. The effect is immediately recognizable, sometimes magnificent, sometimes intrusive — depending on the composition and the density of light points in the frame.

Common mistakes

What we see too often

Confusing bokeh with depth of field. The most common mistake. Many people think "having bokeh" means opening the aperture wide. Wrong: opening up reduces depth of field — the amount of sharp area — but says nothing about the quality of the blur produced. A cheap lens at f/1.8 can generate plenty of blur, but busy, ringed, unpleasant. Bokeh is an optical signature, not a setting.

"Dirty" bokeh that distracts. High-contrast branches, neon signs in the background, saturated highlights badly resolved: anything that survives the blur with a hard edge pulls the eye away from the subject. Good bokeh erases, it doesn't decorate. Before pressing the shutter, scrutinize the background with as much attention as the subject. Step a meter, change angle, stop down a notch if needed. Bokeh is won at framing, not in post.

A background too close to the subject. This is the number-one cause of failed bokeh. If the background sits fifty centimeters behind the face, even at f/1.4 it will stay legible — and therefore distracting. Practical rule: at least three times the subject-to-lens distance between subject and background. Without that gap, no lens in the world will save the image.

How Focalis evaluates

How Focalis evaluates bokeh

Focalis-X analyzes three distinct markers to qualify the bokeh in a photo. First, the softness gradient: the transition between the sharp zone and the blurred background should be progressive, with no abrupt break. Then, the shape of the highlights: round or polygonal bubbles, presence of rings, double edges ("onion ring"). Finally, the distraction level: background elements that survive the blur and compete with the subject. The score combines these three axes to distinguish controlled bokeh from mere abundant blur. Analyze a photo →

FAQ

Frequently asked questions

Aren't bokeh and depth of field the same thing?
No, and that's the most common confusion. Depth of field is a geometric measurement: it describes the extent of the zone that appears sharp in front of and behind the focal plane. Bokeh, on the other hand, describes the quality of what lies outside that zone — the texture of the blur, the roundness of the highlight bubbles, the softness of the transitions. Two lenses can produce exactly the same depth of field and radically different bokeh. One will be creamy and fluid, the other busy and ringed. Depth of field is physical, bokeh is aesthetic.
How do I get bokeh with a smartphone?
Smartphone sensors are too small to produce real optical bokeh: the depth of field is intrinsically enormous. Three solutions exist. Portrait mode, which simulates the blur computationally (effective on simple edges, hopeless on hair and glasses). The distance trick: get within twenty centimeters of the subject with a very distant background — you'll get genuine, modest blur. Clip-on add-on lenses with a wide aperture, which produce real optical bokeh. No software simulation yet matches the signature of a dedicated lens, but portrait modes are improving fast.
Does bokeh work for Reels and vertical formats?
Yes, and it actually becomes a differentiating asset there. In vertical, the subject occupies more frame height and the background is more present than in landscape. Controlled bokeh instantly separates the subject from the setting — crucial in a feed scrolling at speed. Favor 50 mm or 85 mm equivalent focal lengths, wide open, with a background at least two meters away. Avoid "swirly" bokeh that's too pronounced in video: it spins with every camera move and tires the eye. Creamy, neutral bokeh gives a cinematic feel without competing with the narrative.