Tail Slate
A clapperboard slated at the end of a take rather than the beginning, held upside down to signal to the editor that the sync mark occurs at the tail of the shot.
Tail Slate
noun | Production & On-Set
A clapperboard presented and clapped at the end of a take rather than the beginning, used when it is not practical to slate before the performance starts. The 2nd AC holds the slate upside down during a tail slate to visually signal to the editor and sound editor that the sync point — the clap of the sticks — occurs at the end of the shot rather than the beginning. This prevents confusion in post-production when the editor locates the sync mark and needs to know which end of the shot it belongs to.
Quick Reference
| Domain | Production & On-Set |
| Also Called | End slate, tail sticks |
| Position | End of the take, after the director calls "Cut" — or just before on request |
| Orientation | Upside down (sticks at the bottom) |
| Vocal Cue | "Tail slate" or "Tail sticks" called by the 2nd AC or 1st AC |
| Purpose | Sync point when front slate is impractical |
| Related Terms | Slate, Clapperboard, Take, Continuity, Action |
| See Also (Tools) | Shot List Generator |
| Difficulty | Intermediate |
The Explanation: How & Why
The clapperboard serves two functions: it provides a visual record of the scene, take, camera, and roll number, and it provides a sync point — the sharp visual and acoustic event of the sticks clapping together that allows the editor to align the picture and sound tracks in post-production. In standard production, the slate is presented at the beginning of each take, before "Action" is called.
However, there are situations where slating at the beginning of a take is impractical:
Performance-sensitive situations: Some scenes require performers to be in a specific emotional state before the camera rolls. A director may ask for the camera to start rolling while the actor is already mid-emotion, and slating at the front — with the 2nd AC stepping into frame, calling the scene and take number, and clapping — would interrupt or destroy that state. In these cases, the director calls "Action" immediately after rolling, and the slate is done at the tail.
Specific camera positions: Some shot setups make front slating impossible — a very tight close-up where the slate would take too long to clear from frame, a camera position that the 2nd AC cannot safely or quickly reach before "Action" is called, or a specialty rig where the camera is positioned in a space too small for normal slating.
Improvised or reactive shooting: Documentary-style narrative shooting or genuine documentary work may require the camera to start rolling before a slate is practical, capturing a spontaneous moment that cannot wait.
How the tail slate is executed:
After the director calls "Cut," the 2nd AC steps into frame at the end of the take holding the slate upside down. They call out "Tail slate" (or "Tail sticks") audibly on the recording so the sound editor can locate the moment. They then clap the sticks — the sync point — and step out of frame. The upside-down orientation is the universal visual signal: when the editor sees an upside-down slate at the end of a shot, they know the sync point is here rather than at the head.
The vocal call:
Calling "Tail slate" or "Tail sticks" verbally is important because the sound editor locating sync points in post-production needs to know to look for this sync point at the tail of the shot. Without the verbal call, a tail slate can be confused for a front slate on a subsequent shot if the footage is not reviewed carefully.
MOS tail slates:
An MOS shot (shot without sound) may still receive a tail slate — in this case, the slate is presented but the sticks are not clapped (or a simple visual indication is made), since there is no audio to sync. Some productions mark MOS slates with a finger between the sticks before they are opened, indicating "no sound."
Historical Context & Origin
The tail slate practice developed alongside the synchronised sound era beginning in the late 1920s — once sound and picture had to be synchronised in post-production, a consistent slate protocol became essential. The front slate became standard because it allows the editor to identify and sync each take from the first frame of usable material. The tail slate developed as the accepted alternative for situations where front slating is impossible, with the upside-down orientation as its universal visual identifier. The convention is consistent across all professional productions worldwide.
How It's Used in Practice
Scenario 1 -- Emotional Performance (Director / 2nd AC): A director is shooting a scene where an actor must begin in tears. Any pause for a front slate would break the performance state. The director calls "Roll camera, roll sound" and then immediately calls "Action." After the performance concludes and the director calls "Cut," the 2nd AC steps in with the inverted slate for the tail. The actor can remain in their emotional space throughout without interruption.
Scenario 2 -- Tight Camera Position (1st AC / 2nd AC): A close-up is framed so tightly that clearing the slate from the frame would require the 2nd AC to step back several feet and take several seconds — introducing an awkward pause before "Action" can be called. The 1st AC decides to go with a tail slate: the camera rolls, "Action" is called immediately, and the slate follows at the cut.
Scenario 3 -- Editor Identification (Editor): An editor in post-production encounters a shot that begins without a slate. Scrolling forward, they find an upside-down slate at the end of the take with the scene, take, and camera information clearly visible. The audible "Tail slate" call on the soundtrack confirms the sync point. The editor aligns the clap mark with the audio spike, flips the take to read the slate information correctly, and proceeds.
Usage Examples in Sentences
"Going straight to action — we will tail slate it. Emotions first."
"Tail sticks — scene 42, take 3." The 2nd AC claps the inverted board at the end of the shot.
"If the editor sees an upside-down slate at the end of a shot, they know to look for the sync there, not at the head."
"MOS tail slate — no sticks, just the board for identification."
Common Confusions & Misuse
Tail Slate vs. Front Slate: A front slate is clapped at the beginning of the take before "Action" is called; a tail slate is clapped at the end after "Cut" is called. The upside-down orientation of the tail slate is what distinguishes it visually from a normal front slate — without that inversion, an editor might mistake the tail slate for the front slate of the following shot.
Tail Slate vs. MOS: MOS refers to shooting without sound — the sticks may still be clapped on an MOS front slate (providing a visual-only sync reference), but more commonly the sticks are held closed or a finger is placed between them to indicate no audio sync is required. A tail slate can be either with sound (normal sync) or without (MOS identification only).
Related Terms
- Slate -- The standard front slate that the tail slate replaces when front slating is impractical
- Clapperboard -- The physical device used for both front and tail slates; its sticks provide the clap that serves as the sync point
- Take -- The recorded unit of performance at the end of which the tail slate appears
- Continuity -- Tail slates are part of the continuity record; their information matches the camera report and sound report for each take
- Action -- The cue that is called immediately after rolling on a tail-slated take, without the standard pause for front slating
See Also / Tools
The Shot List Generator is relevant to tail slate planning — noting on the shot list which setups are likely to require tail slates (emotional performance shots, tight close-ups, specialty rigs) helps the 2nd AC anticipate and prepare for the modified slating protocol before each setup.
