Sony’s S-Log2 and S-Log3 gamma curves have become essential tools for filmmakers and content creators working with Sony mirrorless and cinema cameras. Both are designed to capture a wide dynamic range, giving you more flexibility and control during color grading—but what are the real differences between them, and which one is right for you?
Let’s break it down.
🎚️ What Are S-Log2 and S-Log3?
Both S-Log2 and S-Log3 are logarithmic gamma profiles developed by Sony to preserve as much image data as possible when recording video. These profiles “flatten” the image in-camera, so it looks desaturated and low-contrast straight out of the camera. But that’s the point—this gives you more room to push and pull the image in post-production without clipping highlights or crushing shadows.
While they serve similar purposes, they have different strengths and use cases.
🔍 Key Differences Between S-Log2 and S-Log3
📈 1. Dynamic Range
- S-Log3 captures up to 14+ stops of dynamic range.
- S-Log2 captures around 13 stops.
If you need to preserve details in both bright skies and dark shadows, S-Log3 has the edge with more highlight headroom.
🧼 2. Noise Performance
- S-Log2 tends to perform better in the shadows, with less noise—especially at lower ISOs.
- S-Log3, while powerful, can introduce more shadow noise, particularly in low-light conditions.
If your priority is a cleaner image, especially in dark scenes, S-Log2 might be the safer choice.
🎨 3. Color Grading Flexibility
- S-Log3 is designed to closely mimic the Cineon film curve, making it easier to match with other cinematic footage.
- S-Log2 has a unique curve, which can require more fine-tuning during grading.
If you’re working in a multi-camera environment or planning detailed color correction, S-Log3 offers smoother workflows.
⚖️ 4. Middle Gray Exposure
- S-Log2 places middle gray at 32% IRE.
- S-Log3 sets it at 41% IRE.
This means you’ll need to expose your scene differently depending on which profile you’re using. Misjudging this can result in underexposure or overexposure.
📌 So, Which Should You Use?
Your decision depends on what matters most for your project:
✅ Use S-Log3 if:
- You want to maximize dynamic range.
- You plan on extensive color grading in post.
- You’re working with other cinema cameras and need to match footage.
✅ Use S-Log2 if:
- You want less noise, especially in shadows.
- You’re shooting in lower light conditions.
- You prefer a simpler image that needs less post work.
⚠️ Pro Tip:
No matter which log profile you choose, proper exposure and monitoring are critical. Always use tools like false color or zebras when shooting log footage, and consider using LUTs on your monitor to preview your final look in real time.
📚 Final Thoughts
Both S-Log2 and S-Log3 are powerful tools that give Sony shooters more control and flexibility in post-production. Understanding the differences between them—and when to use each—will help you capture cleaner, more cinematic footage and elevate your storytelling.
Whether you’re shooting a YouTube video, documentary, commercial, or feature film, selecting the right log profile can make a significant difference in your workflow and the final product.
❓ Frequently Asked Questions: S-Log2 vs. S-Log3
Q: What is the main advantage of S-Log3 over S-Log2?
A: S-Log3 offers a slightly higher dynamic range (14+ stops) compared to S-Log2 (~13 stops), making it better for retaining detail in highlights and shadows.
Q: Why do my S-Log3 shots look noisy in the shadows?
A: S-Log3 compresses more information into the shadow areas, which can introduce more visible noise—especially at lower ISOs. If noise is a concern, S-Log2 is generally cleaner in the shadows.
Q: Is S-Log3 harder to grade than S-Log2?
A: Not necessarily. S-Log3 is designed to match the Cineon curve, making it easier to work with in professional color grading tools and workflows. However, S-Log2 might be quicker for simpler edits.
Q: Can I use the same LUTs for both S-Log2 and S-Log3 footage?
A: It’s best to use LUTs that are specifically designed for each log curve. Applying an S-Log3 LUT to S-Log2 footage (or vice versa) can result in incorrect colors and contrast.
Q: Which profile is better for low-light shooting?
A: S-Log2 generally performs better in low light due to its cleaner shadow response and lower noise levels.
Q: Do I need to overexpose log footage?
A: Slight overexposure (by about +1 to +1.5 stops) is often recommended to reduce noise and preserve shadow detail, especially with S-Log3. Just be careful not to clip your highlights.
Q: Can I switch between S-Log2 and S-Log3 during a shoot?
A: Technically yes, but it’s not recommended unless you’re experienced with color grading and matching footage. For consistency, stick with one gamma curve per project when possible.