Coverage and continuity

Most scenes are recorded not as one continuous shot but as a series of shots from different positions, which the editor assembles into a sequence that feels continuous. For that illusion to work, the shots must be planned so that they cover all the action, and they must match: people must be in the same places, looking in consistent directions, holding the same props, doing the same things at the same moments. This lesson explains how scenes are covered, the rules of screen direction that keep the viewer oriented (above all the 180-degree rule), how to keep continuity across shots, and how to plan the order of setups so that coverage is efficient on set.

The master shot method

The classic way to cover a scene is the master shot method. First, a master shot records the whole scene from beginning to end in a wide or medium-wide framing that shows everyone and the geography of the space. Then the same action is repeated for closer shots: two-shots, over-the-shoulders, singles of each character, and inserts of important objects. The editor can then cut freely between angles at any moment, because every part of the scene exists in several sizes. A typical coverage list for a two-person dialogue scene is:

• Master (wide two-shot) of the whole scene.
• Over-the-shoulder (or medium single) on character A, and its reverse on character B.
• Close-up on A and close-up on B.
• Inserts: hands, props, a document being read.
• Cutaways: other things in the location, such as a clock, a window or a passer-by, which help bridge edits and compress time.

Not every scene needs full coverage. Experienced directors shoot only the angles the scene needs, sometimes playing a whole scene in a single, carefully staged moving shot (a oner). But for beginners, generous coverage is the safest way to give the editor options.

The 180-degree rule

In any scene, an imaginary line, the axis of action, runs between the two main characters (or along the direction of movement). The 180-degree rule says that all shots of the scene should be taken from the same side of that line. If the camera stays on one side, character A always looks right and character B always looks left, and the viewer understands that they are facing each other. If the camera crosses the line between shots, A suddenly also looks left, and the viewer is momentarily confused about who is where.

The line can be crossed deliberately and without confusion in several ways: by moving the camera across the line during a shot, so the viewer sees the change; by having a character move across the line; by cutting to a neutral shot taken directly on the line or to a cutaway; or by establishing a new axis when characters reposition. Crossing the line abruptly can also be a deliberate choice to signal disorientation or a shift in power, but it should be a choice, not an accident.

Screen direction for movement

The same principle applies to movement. If a character walks from left to right in one shot, they should continue left to right in the next, or they appear to have turned around. A journey that consistently runs left to right across shots feels like progress in one direction; a return journey runs right to left. Chase scenes rely on consistent direction for the pursuer and the pursued. When a change of direction is needed, show it: the character turns on screen, or the camera moves to a new position in view of the audience.

Eyelines

When two characters are shown in separate shots, their eyelines must match for the viewer to believe they are looking at each other. If A looks slightly camera right and up (because B is standing), then in the reverse shot B should look camera left and down. Eyeline height matters as much as direction: a seated character looking at a standing one looks up, and the reverse looks down. Use marks or a stand-in at the right height for the actor to look at when the other actor is not present, and keep the camera at a consistent height relative to each character's eyes.

The 30-degree rule

When cutting between two shots of the same subject, the camera position should change by at least about 30 degrees, or the shot size should change substantially. Otherwise, the cut looks like a small jump (a jump cut) rather than a new view. This is why coverage combines different angles and sizes: a medium shot and a close-up from slightly different angles cut smoothly, while two medium shots from almost the same position do not.

Continuity

Continuity is the consistency of everything the viewer can see and hear across shots that are meant to be continuous in time. Because shots are filmed minutes or hours apart, many things can change: a glass that was half full is now full, a cigarette is longer than it was, a scarf has moved, the light has changed, an actor raises a cup with the other hand. Viewers may not notice small errors consciously, but they sense that something is wrong. Continuity is protected by:

• Performance: actors repeat actions the same way, at the same points in the dialogue, in every take and angle.
• Props, costume, hair and makeup: departments photograph and record each look and reset props between takes.
• The script supervisor: notes which lines and actions occur in each take, eyelines, screen directions, prop handling and timing, and flags inconsistencies before they become problems.
• Light and time of day: shooting all angles of a scene under consistent light, which is difficult outdoors as the sun moves.

In practice, the editor will choose performance over continuity when they conflict: a powerful take with a glass in the wrong hand usually wins. But the fewer such compromises the better.

Cutting on action

Cuts are least noticeable when they happen during movement, because the eye follows the motion and does not register the change. A character reaching for a door handle in a wide shot can be cut to a close-up of the hand completing the movement; a person sitting down in a medium shot can be cut to a closer shot as they settle. To make this possible, actors overlap the action: in each angle they repeat the whole movement, not just the part expected to be used, so the editor can choose the cut point. Camera operators should start recording before the action begins and keep rolling until well after it ends.

Planning setups efficiently

Each new camera position, a setup, takes time to light, rehearse and shoot, often 30 minutes or more on a professional set. Productions therefore order setups to minimize changes: they shoot all angles in one direction before turning around, group shots that share a lens or lighting arrangement, and shoot the widest shots first, when the whole set must be dressed and lit, before moving in for closer shots that need only part of it. A shot list (Lesson 9) records the setups and their order, and the assistant director uses it to estimate how many scenes can be shot in a day.

Coverage for documentary and events

In documentary and event work, the action cannot be repeated, so coverage is gathered differently. A single operator varies shot sizes during the action, changing size between sentences or moments rather than during them; a second camera holds a wide shot while the first moves in for details; and the operator collects cutaways and reactions before and after the main action. Interviews are covered with two cameras at different sizes, or by changing size between questions. The principles are the same: give the editor different sizes, keep screen direction consistent, and record enough before and after each moment to cut.

Continuity in practice

On a small production without a script supervisor, someone must still watch continuity. A few practical habits help: photograph the set, props and actors' costumes at the start of each scene and whenever something changes; note which hand an actor uses for important actions and where they are in the dialogue when they do it; keep drinks at consistent levels by refilling between takes; and keep an eye on clocks, candles and anything else that changes with time. Watching the previous take's ending before starting a new angle reminds everyone of positions and actions. Most of all, ask actors to keep their actions simple and repeatable: a performance that changes greatly from take to take is hard to cut, however good each take may be on its own.

Continuity also applies to sound. If one angle is recorded with a noisy air conditioner running and another without, the background changes at every cut. Keeping background sound consistent across angles, recording room tone for each setup, and noting problems on the sound report help the editor smooth the scene.

Before leaving a location, run through the coverage checklist with the director: is every line and action covered in at least two sizes, are there reactions for every important moment, are the inserts and cutaways recorded, and has room tone been captured? A few minutes of checking can save a return trip to the location.