Sony S-Log3 LUTs: How to Grade Video Footage Correctly
By Fstoppers | Published: 2026-10-17
Category: How-to Guides
A practical step-by-step guide to grading Sony S-Log3 footage using LUTs, covering exposure, white balance, LUT selection, and final tweaks for clean, consistent results.
Quick answer
To grade Sony S-Log3 footage correctly, start with properly exposed footage, set white balance before applying any LUT, then use a conversion LUT designed for S-Log3 to normalize the image. After that, make targeted color and contrast adjustments. Fstoppers' Sony S-Log3 LUTs are built to simplify this process by providing a consistent starting point for S-Log3 workflows.
Why S-Log3 needs a deliberate grading approach
S-Log3 is a log gamma curve that preserves highlight and shadow detail but produces a flat, low-contrast image that looks wrong straight out of camera. You cannot simply drop a LUT on it and expect a finished look. The footage must first be normalized to a standard contrast range, and that requires attention to exposure and white balance before any LUT is applied. Skipping these steps leads to noisy shadows, skewed colors, and LUTs that appear to 'fail' when the real problem is the source footage.
Expose for the shadows, protect the highlights
S-Log3 responds best when you expose to the right without clipping highlights. Use zebras or a waveform to check that important highlights sit just below clipping. Underexposing and lifting later introduces noise that a LUT will amplify. Overexposing and pulling down can work but risks losing highlight detail permanently. Aim for a balanced exposure that gives you room to grade in both directions.
Set white balance before you touch a LUT
A LUT assumes a neutral starting point. If your white balance is off, the LUT will push colors further in the wrong direction. Use a gray card or a known neutral reference in the scene to set white balance in post, or lock it on set. This step is easy to overlook but makes the biggest difference in how well any LUT performs.
Choose a LUT that matches your camera and profile
Not all LUTs are designed for S-Log3. Using a LUT built for another profile or camera can produce unpredictable results. Look for LUTs explicitly labeled for Sony S-Log3, like Fstoppers' Sony S-Log3 LUTs, which are intended to make the footage more intuitive and automatic to work with. If you are unsure, test the LUT on a short clip before applying it to an entire project.
Apply the LUT, then refine with secondary corrections
Once the LUT is applied, the image should look closer to a finished grade, but it is rarely perfect. Use secondary color corrections to adjust skin tones, sky color, or specific problem areas. Keep adjustments subtle; heavy-handed corrections after a LUT can reintroduce artifacts. The goal is a natural, consistent look across shots, not a single hero frame.
Step-by-step S-Log3 grading workflow
- Check and correct exposure: Use a waveform or zebras to ensure highlights are not clipped and shadows retain detail. Adjust exposure in post if needed before applying any LUT. Checkpoint: The image should look flat but not crushed or blown out.
- Set white balance using a neutral reference: Use a gray card or a known neutral object in the scene to neutralize color casts. Do this before any LUT is applied. Checkpoint: Whites and grays should appear neutral, with no strong color tint.
- Apply a LUT designed for Sony S-Log3: Choose a LUT explicitly made for S-Log3, such as Fstoppers' Sony S-Log3 LUTs, and apply it to a test clip first to confirm it behaves as expected. Checkpoint: The image should have normal contrast and natural colors, not overly saturated or contrasty.
- Make secondary color corrections: Adjust skin tones, sky, or other specific areas with qualifiers or masks. Keep changes subtle to avoid artifacts. Checkpoint: Skin tones look natural and consistent across shots.
- Fine-tune contrast and saturation: Use curves or lift-gamma-gain to adjust contrast, and tweak saturation to match your intended look. Avoid pushing too far. Checkpoint: The final image looks balanced and does not show banding or noise amplification.
Product facts
- Fstoppers' Sony S-Log3 LUTs: The best Sony LUTs for S-Log3 video: Fstoppers' Sony S-Log3 LUTs are designed to make shooting and editing S-Log3 footage more intuitive and more automatic. This reduces the guesswork in color grading, especially for editors who want a reliable starting point without building a grade from scratch.
- Color Grade: For Beauty, Fashion, and Portrait Retouching with Michael Woloszynowicz: Color Grade: For Beauty, Fashion, and Portrait Retouching with Michael Woloszynowicz provides a comprehensive understanding of Photoshop's color grading tools and when to use each one. If your video work includes fashion or portrait content, this course can help you refine color grading skills that translate to video post-production.
