Second Unit Photography

noun | Production

The filming conducted by a secondary crew unit that operates independently of the main production unit, shooting footage that does not require the director's direct supervision or the principal cast's presence. Second unit photography covers establishing shots, location scenics, action sequences shot with stunt performers or doubles, insert shots, pick-up footage, and any other material that can be captured without the creative core of the main unit.

Quick Reference


Also Known As	Second unit, B-unit
Domain	Production
Supervised By	Second unit director (or 1st AD of main unit in some productions)
Covers	Establishing shots, scenics, action with doubles, inserts, pick-ups
Distinguished From	First unit / main unit (principal cast and director)
Related Terms	Principal Photography, Coverage, Storyboard, Shot List, Pre-Production
See Also (Tools)	Production Schedule Calculator
Difficulty	Intermediate

The Explanation: How & Why

Second unit photography exists to increase production efficiency. The main unit -- the director, principal cast, DP, and full crew -- is the most expensive unit on any production. Every hour the main unit spends filming an establishing wide shot of a city skyline or a car driving on a highway is an hour of full main unit cost for footage that does not require the director or principal cast. Second unit allows this material to be captured simultaneously by a smaller, lower-cost crew while the main unit focuses on scenes that require their specific capabilities.

Second unit operates under a second unit director (sometimes a specialist stunt coordinator or the main unit's 1st AD) who works from the main director's shot list, storyboards, or brief. The second unit director does not make creative decisions that affect the main narrative -- they capture pre-specified coverage that the main unit director has defined.

Common second unit assignments:

Location scenics and establishing shots: Wide shots of cities, landscapes, buildings, and environments that establish the film's world but require no cast or performance. These can be shot by a small crew of two to four people with minimal equipment.

Action sequences: Complex stunts and vehicle action sequences are often more efficiently managed by a dedicated stunt-oriented second unit with specialist personnel. The main unit's director may not be present for stunt sequences; the second unit director and stunt coordinator jointly manage them.

Double work: Shots in which stunt doubles or body doubles stand in for principal cast -- wide shots where the actor's face is not visible, physical action that is dangerous for the principal cast.

Inserts: Close-up shots of specific objects, body parts, or details that require no full cast or set but that the main unit did not have time to capture during principal photography.

On large productions, second unit may operate simultaneously with the main unit for the duration of principal photography. On smaller productions, second unit may operate only for a specific period -- covering location work while the main unit shoots interiors, for example.

Historical Context & Origin

Second unit photography as a formalised production structure developed with the Hollywood studio system of the 1930s and 1940s, when the scale of major productions made simultaneous multi-unit filming economically necessary. Western and adventure films that required location footage of landscapes and action could not wait for the main unit to travel to remote locations -- second units were dispatched independently. The elaborate second unit work in films like Ben-Hur (1959) and the James Bond series established the second unit as an integral production structure. Directors including Yakima Canutt and Hal Needham specialised in second unit action direction, developing it into a recognised specialty. Contemporary blockbusters may run multiple second units simultaneously across different continents, filming location scenics and action sequences while the main unit works on studio sets.

How It's Used in Practice

Scenario 1 -- Simultaneous Units (Producer / 2nd Unit Director): A thriller is filming principal photography at a studio. Simultaneously, the second unit is in another city capturing establishing shots of the city's skyline and street level footage that establishes the film's location. The second unit shoots for four days with a crew of six; in the same period, the main unit has completed eight scenes of principal photography. Both units' footage is delivered to the editor daily.

Scenario 2 -- Action Second Unit (Stunt Coordinator / 2nd Unit Director): A car chase sequence is shot by the second unit over three days under the stunt coordinator's supervision, without the director or principal cast present. The main unit's director has provided a detailed storyboard and shot list for the entire sequence. The second unit captures every shot on the list using stunt drivers and vehicles. The editor cuts the sequence from second unit footage entirely.

Scenario 3 -- Insert Second Unit (1st AD): After the main unit wraps, the 1st AD takes a small second unit of three people -- camera operator, focus puller, and grip -- and shoots 15 close-up insert shots that the main unit did not have time for: a hand on a doorknob, a phone screen, a specific object in a drawer. The inserts take four hours; during principal photography they would have consumed a full day of main unit time.

Usage Examples in Sentences

"Send the second unit to the harbour for the establishing shots while we stay on the studio set."

"The car chase is all second unit -- the director will not be on that shoot."

"We are running two units simultaneously -- it adds 20% to the budget but saves two weeks of schedule."

"Second unit covers what the main unit cannot afford to spend time on."

Common Confusions & Misuse

Second Unit vs. Pickups: Pickups are supplementary shots captured after principal photography wraps, filling gaps in the coverage identified in the edit. Second unit photography typically operates during principal photography as a simultaneous supplementary unit. Both produce footage that supplements the main unit's work, but second unit is scheduled alongside the main shoot while pickups address post-production discoveries.

Second Unit Director vs. Director: The second unit director executes pre-specified shots from the main director's brief -- they do not make independent creative decisions about the film's narrative or visual style. On large action productions, a specialist second unit director may have significant creative latitude within the stunt sequences they are directing, but they work in service of the main director's overall vision.

Related Terms

Principal Photography -- The main unit shoot that second unit supplements
Coverage -- Second unit extends the main unit's coverage with additional material
Storyboard -- Second unit works from the main director's storyboards and shot lists
Shot List -- The main unit's shot list guides second unit shooting
Pre-Production -- Second unit assignments are planned and scheduled during pre-production

Second Unit Photography