Did my camera record the preview LUT into the product footage, or was it only helping me monitor the shot?

Separate the three possible roles of a LUT

A lookup table, or LUT, can transform image values for monitoring or processing. Its role depends on where the camera applies it.

A monitoring LUT changes how footage appears on a screen so an operator can judge composition, focus and approximate color while recording a Log signal.

A recorded or baked-in transform changes the actual stored picture values. A LUT embedded as metadata or an associated file can instead provide instructions for compatible software without necessarily changing the recorded image pixels.

Sony's Log documentation distinguishes image display LUTs from Log recording. Its FX5 documentation also provides separate LUT controls for the LCD/viewfinder, HDMI output and proxy or remote-live-view paths.

These distinctions matter because a merchant may see a richly contrasted bottle on the camera monitor, then import a flat-looking file and assume something went wrong. The difference may be entirely expected.

Conversely, applying another display transform to footage that already contains a baked-in treatment can produce excessive contrast, saturation or clipped-looking highlights.

Inspect the actual recording path

Record camera model, recording mode, gamma or Log curve, gamut, selected LUT and the destination on which it is enabled. Preserve the main camera file separately from proxies and external-recorder media.

1. Identify the original file's documented gamma and gamut. A flat preview alone is not proof of Log.
2. Record the editor's automatic input assignment and project color management, including working and output spaces.
3. List manual technical conversions, creative LUTs and display-only viewer LUTs. Establish the intended processing chain before bypassing anything.
4. Check whether the same Log-to-display conversion is applied manually as well as automatically. One legitimate chain may contain distinct input and output transforms; those are not automatically duplicates.
5. Compare the intended chain with the suspected duplicate at the same source frame, then inspect a short export in a documented viewing path.

The actual ILME-FX5/FX5B instructions distinguish monitor-LUT destinations for HDMI, Proxy/Remote Live View and LCD Monitor/VF. An HDMI LUT can affect the signal supplied to an external recorder without establishing what the internal main file stores. A proxy can also differ from the main recording.

Sony's FX2/FX2B Log Shooting Setting separately documents Embed LUT File and conditions that lock it Off. This establishes an embedding control, not proof that it changes recorded pixel values or that a particular editor automatically uses it.

Hypothetical example: a green product carton

Hypothetical worked example. A green carton is recorded as documented Log media. No camera recording, color measurement or editor operation was performed.

A uses a camera-monitor display LUT while the main original retains the stipulated Log encoding. In the editor, its correct gamma and gamut are assigned and one documented input-to-working-to-display chain is used.

B uses the same original but adds the same Log-to-display LUT at two places in the processing path. Under the example's assumptions, this duplicate produces excessive contrast and obscures dark print. The editor removes the unintended duplicate and compares the result; contrast alone would not identify the responsible stage.

C is a separate source known from its recording documentation to contain a baked display-oriented treatment. Applying the original Log conversion to C would misinterpret that source. This case is not attributed to an unverified FX2 or FX5 recording setting.

The completed decision selects A's documented chain, rejects B's duplicate and requires source-specific input handling for C. Monitor appearance describes a viewing path; it does not certify stored pixels.

Use a reference target without treating it as certification

Including a known neutral or color reference in a controlled test can help distinguish a broad transform problem from a product-specific color discrepancy.

Compare the original source and processed result under documented viewing conditions. A LUT can make footage easier to view, but it does not prove the camera captured the product's exact material color.

Inspect label highlights, dark print, neutral areas and the actual green finish. If the source has clipped information, another transform cannot reconstruct it.

Keep the original recording, applied transform, color-management settings and approved export together. If the monitoring appearance and recording differ, document that difference rather than silently recoloring the merchandise.

CartVisual does not operate the external camera's LUT system or certify the finished grade. Generated video should be treated as another source whose actual color characteristics must be inspected.

Record your own observations

The filled rows are illustrative examples. Use the blank row for your own files and observations.

Download the editable CSV worksheet

What the references establish

• Sony Help Guide for Creators — What Is S-Log?: Explains low-contrast Log monitoring and the roles of Image Display LUT and Gamma Display Assist.
• Sony FX5 Help Guide — Applying a LUT to the Output Video: Retrieved ILME-FX5/FX5B output-LUT instructions distinguish HDMI, Proxy/Remote Live View and LCD Monitor/VF destinations in log mode. They establish output controls, not the behavior of an unverified external recorder or editor.
• Sony FX2 Help Guide — Log Shooting Setting: Retrieved FX2/FX2B Log Shooting Setting lists recording modes, gamut and Embed LUT File, including conditions that lock embedding Off. Embedding and baked pixel conversion are distinct; third-party handling is not established by this page.