Assist camera operators during line up and rehearsal

Business Sectors (Suites): Camera
Developed by: ScreenSkills
Approved on: 29 Mar 2020


​This standard is about assisting camera operators during line up and rehearsal. This could apply to any type of production including feature films, TV dramas, commercials, documentaries, sports coverage, outside broadcast and live or stage events.

This includes selecting and preparing lenses, recording mark-up requirements, setting focus and call marks and explaining colour coding systems to actors.

This Standard is relevant to those responsible for assisting camera operators during line up and rehearsal including those working as 2nd Assistants or Clapper loaders.

Performance criteria

You must be able to:

  1. ​assist camera operators when required to meet production requirements
  2. check that sufficient supplies of specified lenses are available
  3. prepare specified lenses for use in line with production requirements
  4. supply prepared lenses to appropriate people  when they are required
  5. handle lenses in ways that maintain their condition at all times
  6. set focus and call marks in line with production requirements
  7. record focus marks in appropriate formats
  8. mark up actor and camera positions using correct colour-coding systems
  9. explain colour-coding systems to actors at times that will not interrupt productions
  10. work on set in line with production health and safety requirements

Knowledge and Understanding

You need to know and understand:

  1. ​key characteristics of current lenses
  2. handling techniques and the implications of damage to lenses
  3. cleaning and maintenance procedures and products for lenses
  4. when it is appropriate to assist camera operators
  5. how to check supplies of lenses
  6. how to interpret requirements for lens preparation
  7. the benefits of attending first rehearsals
  8. the benefits of laying focus marks and call marks for others
  9. how to interpret requirements for focus and call marks from rehearsal
  10. industry accepted colour coding systems for focus and call marks
  11. the role of others involved and when to liaise with them including camera operators, and 1st camera assistants or focus pullers
  12. any special requirements to ensure the safety and security of equipment when left unattended
  13. the requirements of the relevant Health and Safety legislation and procedures


Scope Performance

Scope Knowledge





Links To Other NOS

External Links

Version Number


Indicative Review Date

30 Mar 2024





Originating Organisation


Original URN


Relevant Occupations

Arts, Media and Publishing, Media and Communication, Media Associate Professionals, Performing Arts

SOC Code



camera; shoot; manufacturers; suppliers; accessories; live events; exhibitions; rehearsal; health and safety requirements; camera operations;