What Is a Split Diopter Shot? 7 Famous Examples in Film

A split diopter shot keeps two subjects sharp at very different distances, one close to the camera and one far away, with a soft blur between them. Cinematographers get it by fitting half of a close-up lens in front of the camera lens, so one side of the frame focuses near and the other focuses far.

The result looks like two shots in one, and that tension is the point. Below: how it works, how it compares to deep focus, 7 famous split diopter shots and how to shoot your own.

How a Split Diopter Works

A diopter is a close-up lens. Screw one on and your camera can focus much closer than it normally could. A split diopter is that same lens cut in half, so it covers only part of the frame.

Set the camera lens to focus on something far away, like an actor across the room. The open half of the glass sees that actor sharp. The diopter half bends the light so it focuses close, on an actor near the lens. Two focus distances, one frame.

Here’s the catch. A split diopter doesn’t create real deep focus. It only creates “the illusion of this,” because everything between the two sharp planes stays soft. The ASC is blunt about it: diopters “do not alter the depth of field of your shot.” They add a second plane of focus.

The giveaway is the seam, a blurry line where the two halves of glass meet. Good crews hide it along something already in the frame, like a door frame, a wall edge or a dark gap between two actors.

Split Diopter vs Deep Focus vs Rack Focus

All three put more than one thing in focus, but they work in very different ways.

	Split Diopter	Deep Focus	Rack Focus
What’s sharp	Two planes, with soft space between them	Everything from near to far	One plane at a time, shifting during the shot
How it’s done	Half a close-up lens in front of the main lens	Small aperture, wide lens, lots of light	The focus puller turns the focus ring mid-shot
Use it when	You can’t light for deep focus, or you want two faces locked in one frame	You want the audience to choose where to look	You want to move the audience’s eye on cue

For more on how aperture controls focus, see our guide to aperture and depth of field. For staging people at different depths, see shot composition in film.

7 Famous Split Diopter Shots in Film

These 7 count down by how much the split diopter does for the story, from a starship that needed it for the light to a newsroom that needed it for the meaning.

7) Star Trek: The Motion Picture (1979)

Star Trek: The Motion Picture used split diopters on the Enterprise bridge because there wasn’t enough light to do it any other way.

Kline said he “employed split diopters on most of the scenes,” working at only about 20 foot-candles of light. The bridge’s rear-projection screens held him near f/2.8, so split diopters let him fake the look of f/5.6 or f/8 and keep Kirk and his crew sharp at different depths.

It’s also the best lesson in what can go wrong. The bridge is round, and the diopter’s straight seam cuts right through its curved railings. Once you spot the break in a railing, you’ll see it all over the film.

6) Challengers (2024)

Challengers proves you don’t need the glass anymore, because its split diopter look was built in post.

Mukdeeprom shot Challengers on Kodak 35mm film, but for the climactic match the team built what British Cinematographer calls “a faux-double split-diopter composite shot of all three players.” The split diopter look comes from combining elements, not from a half lens.

That’s where the technique is heading. Digital compositing gives you the same two-plane look without the seam rules, the light loss or the locked camera. The storytelling idea stays the same: put two people in one frame, both sharp, and let the audience feel the distance between them.

5) The Andromeda Strain (1971)

The Andromeda Strain holds the record for split diopter shots, with about 208 of them, and some split focus three ways.

Eight years before Star Trek, Wise and Kline turned the split diopter into a style. The ASC counts 208 shots in The Andromeda Strain, and film researcher Vashi Nedomansky found shots with two diopters stacked, creating three zones of focus in one frame.

The lab set made it easy. The plain white, orange and gray walls are perfect for hiding seams, because a blur across a blank wall looks like nothing at all. If you want to try the technique, start with a set like this.

4) Hoffa (1992)

Hoffa used several diopters at once to keep three actors sharp at three different distances.

According to the ASC, Burum held Danny DeVito and John C. Reilly in focus at opposite edges of the foreground while Bruno Kirby, playing a nightclub comedian, stayed sharp on a stage far behind them. That took more than one diopter in front of the lens.

Burum earned an Oscar nomination for Hoffa. His advice for anyone trying it is practical: measure focus from the diopter itself, not the camera, and build your own charts for the lenses you actually use, because every lens is a different length.

3) Carlito’s Way (1993)

Carlito’s Way pulled its split diopter out in the middle of a shot, so the frame moves from split focus to normal while you watch.

As the camera zoomed past a waitress, the first assistant camera pulled the diopter out of the matte box at a spot marked on the zoom ring. The split focus disappears at exactly the right moment, and most viewers never notice.

It’s a reminder that a split diopter doesn’t have to lock the camera down. With rehearsal and a good first AC, the diopter becomes part of the camera move. Our guide to what a cinematographer does covers how the camera team splits that work.

2) The Hateful Eight (2015)

The Hateful Eight saves its 13 split diopter shots for the moments that matter most.

Richardson shot The Hateful Eight on Ultra Panavision 70, one of the widest formats ever made. Vashi Nedomansky counted 5 split diopter setups and 13 shots, and found that all of them “come at highly emotional or critical story points during the film.”

That restraint is the lesson. A wide 70mm frame inside one cabin makes split focus tempting in every scene. Tarantino uses it only when two characters need to be read at once. It’s no surprise that the top Reddit thread for “split diopter shot” starts with a Hateful Eight screenshot.

1) All the President’s Men (1976)

All the President’s Men uses split diopters to keep the newsroom watching over every phone call.

Willis used the split diopter, which held “a slice of background sharp while our reporter talked in focus up front.” He worked with Panavision on “a 360-degree rotating diopter frame” so the diopter could slide in and out at any angle, even with the camera moving.

The famous moment is a single take that runs about six minutes. Woodward works the phones while the frame slowly tightens from a medium shot to a close-up, and a camera assistant eases the split diopter out. The newsroom fades as Woodward’s world narrows to one call. The technique carries the meaning, and you barely notice it.

The Directors Who Love the Split Diopter

• Brian De Palma made it his calling card. He and Mario Tosi “used split-field diopters throughout the shoot” of Carrie (1976). Blow Out (1981) has about 15 and appears in our depth of field examples. The Untouchables (1987) holds De Niro in the distance and an opera singer in close-up.
• Quentin Tarantino used it in Reservoir Dogs, Pulp Fiction and Jackie Brown before The Hateful Eight.
• Steven Spielberg and cinematographer Bill Butler used it on Jaws (1975).
• Robert Wise and Richard H. Kline used it more than anyone, as entries 7 and 5 show.

How to Shoot a Split Diopter Shot

1. Pick a strength. Diopters are rated in numbers like +1/2, +1, +2 and +3. With your lens focused at infinity, a +1 focuses at 1 meter (about 3.3 feet), a +2 at half a meter and a +3 at a third of a meter. Higher numbers mean a closer near subject.
2. Stage in two planes. Near subject on one side, far subject on the other, with a gap between.
3. Set focus in two steps. Focus the lens on the far subject, then move the near subject until it’s sharp through the diopter. Measure from the diopter, not the camera.
4. Hide the seam. Line it up with a vertical edge already in the frame, such as a door frame, a wall corner or a dark gap. Crews also black out the cut edge of the glass with paint or tape to stop stray light from the edge.
5. Keep the camera still, or plan the move. A pan slides the seam across the set. If you need movement, rehearse it like Carlito’s Way.
6. Light both planes evenly. If one side is much brighter, the seam shows.

Cinema diopters fit in a matte box and rent from camera houses. Cheap screw-on versions work for practice. Or shoot two plates and combine them in post, the way Challengers did.

For the bigger picture of how lenses and shot sizes work together, see our guide to types of shots in film and our cinematography guide.

FAQs About Split Diopter Shots

The Final Cut: Why the Split Diopter Shot Still Works

So, what is a split diopter shot? It’s half a lens doing the work of two, holding near and far in focus while the space between falls away. It began as a fix for low light and became a way to show two people who can’t stop watching each other.

Here’s a drill for this week. Watch the newsroom scenes in All the President’s Men and count the split diopter shots. Then watch again and ask what each one makes you feel. The technique is easy to spot. The reason behind it is the part worth stealing.