Last Updated 1 day ago
Filmmaking Dictionary: Number 1 / 1-Light (One-Light) Transfer / Grade
Definition
A one-light transfer, print or preliminary grade uses a consistent basic correction rather than individually balancing every shot. The term comes from photochemical printing, where printer-light settings determine the exposure of the print.
In modern conversation, a crew may use ‘one-light’ more loosely for a simple transfer or viewing pass. Confirm whether the correction stays fixed across all material, changes between rolls or includes basic scene balancing. Different facilities may use the label differently.
What a One-Light Can Show
When the viewing treatment remains consistent, exposure and colour differences in the source remain easier to compare. If one take is darker than the previous take, the transfer does not automatically hide that difference with an individual correction.
That makes a one-light useful for an initial assessment, but it is not a complete diagnosis. Film stock, processing, scanning, viewing transforms and display calibration affect the result. A dark viewing copy does not by itself prove that the camera negative contains no recoverable detail.
Advertisement
One-Light Versus a Finished Grade
- One-light pass: Applies a consistent basic treatment over the agreed material.
- Balanced dailies: May adjust shots or rolls to make viewing more consistent.
- Final grade: Refines shot matching, contrast, colour and creative intent across the edited film.
- Source scan: May retain information that is not obvious in a limited viewing copy.
The word does not mean that only one lamp was used to light the scene. It also does not specify the scanning resolution, file codec, bit depth or colour space. Those need their own delivery instructions.
Example in a Film Workflow
A cinematographer shoots an exposure test with several bracketed takes. A consistent transfer helps show their relative differences. If each take is independently corrected to similar brightness without telling the cinematographer, the viewing copies can obscure the purpose of the test.
For routine dailies, the production may prefer a viewing treatment closer to the intended look. The important step is agreeing on the purpose of the pass and documenting what adjustments have been made.
What to Specify
- The material over which the correction remains fixed.
- The viewing transform or reference look.
- Whether individual problem shots may be adjusted.
- The required files and accompanying metadata.
- How viewing copies relate to the retained original material.
Advertisement
Frequently Asked Questions
Is a one-light always uncorrected?
No. It can include a base correction; the defining distinction is the limited or consistent treatment rather than a detailed shot-by-shot finish.
Can digital footage receive a one-light grade?
The phrase is sometimes used that way. Clarify the actual processing, because the original term comes from film printing.
Related Terms
Browse all terms starting with 1 or return to the filmmaking dictionary.