First Assistant Camera

What they do

Prep happens at the rental house: a full inventory, condition checks on bodies, lenses, filters and accessories, and lens tests covering collimation, back focus and tracking, plus a steady test on film cameras. Weather-proofing gets fitted and checked, and the truck is packed so it unloads in the order the schedule needs. Each shooting day starts with a sheltered camera base for building, charged batteries, bodies mounted and levelled, a field test of functionality, and ISO, shutter and frame rate set. During the day the first AC fits filters and accounts for combined filter factors, sets the aperture the cinematographer calls, lays focus marks with a tape or a laser, pulls through every take, watches for light hitting the front element and sets flags for it, and reports any suspicion of soft focus immediately. They ask the first assistant director for the time to get marks and rehearse, liaise with grips on tracking and crane shots, with the electrical department on flag stands for flares, and with the script supervisor to record technical data for every setup. On digital bodies they clean the optical low pass filter. At wrap they de-rig, clean anything that touched ground or water, check for damage, and repack into original flight cases, cross-referenced against the carnet when the show travels.

What they decide

The calls that belong to this role and no other.

• Where the focus is at every moment of every take, including which eye
• The marks: where they are laid, how they are read, and what happens when the actor drifts off them
• Whether the camera package is fit to shoot, and whether a lens goes back to the rental house
• Which filters go in the matte box, and the combined filter factor the cinematographer has to know about
• Whether to call a take soft, which costs minutes now and prevents a reshoot later
• Requests rehearsal and marking time from the first assistant director, who decides whether the day can give it

Principles of the craft

• A focus pull is a rehearsed performance, not a reaction: it is a set of physical marks and a rhythm learned in rehearsal. When the actor changes the timing, you follow their intention rather than their distance, which is why the good ones watch the performer and not the barrel.
• The subject is a decision, not a fact: in a two-shot at a wide stop, somebody is soft. Knowing which eye of which actor the scene needs sharp on which line is the difference between a focus puller and a rangefinder.
• Prep is where the day is won: a lens with drifting back focus, a loose mount or an unbalanced head produces failures that look like operator error and cost hours on the floor. Collimation and tracking get checked before the camera leaves the rental house, not on set.
• Report the soft take: the only expensive mistake is the one found in the edit. Saying 'that one was soft' within five seconds is the job, and the role rewards people who are comfortable being briefly unpopular.
• Own the physical order of the truck and the cart: kit packed in shooting order buys minutes at every setup, and those minutes are what let the cinematographer light the last shot of the day properly.

Common mistakes

• Judging focus off an on-set monitor instead of marks, measurement and a dedicated focus monitor
• Pulling to the middle of an actor rather than to the near eye
• Skipping marks because rehearsal was rushed, then guessing during the take
• The experienced version: technically flawless pulls that land a beat late on every emotional turn, because the rack is timed to the movement rather than to the line
• Changing a filter and not telling the cinematographer that the exposure moved
• Not testing a splinter unit or second unit package because it came from the same rental house as the main one

How to learn it

Exercises and routes in, not a reading list.

• Tape a measure to the floor and have somebody walk from twelve feet to three while you pull by hand at the widest stop you have. Fifty repetitions. Then do it again with your eyes on the actor, not the barrel.
• Shoot a two-hander at the widest stop and rack between them on specific words. Play it back frame by frame and mark where each rack lands early or late. Repeat until the racks land on the word.
• Test one prime against a chart at three, eight and twenty feet at every stop. Find where it is actually sharpest and how much the frame size shifts as it breathes. Write it down and keep it.
• Build a full camera package blind, body, mount, lens, matte box, monitor, follow focus, battery, and time yourself. Halve the time over two weeks. Speed here is a safety property, not a boast.
• Ask a working first AC to show you their camera report and mark-up notes from one day, and list every piece of information you would not have thought to record.