Understanding the Basics
* What are LUTs? LUTs are essentially mathematical formulas that transform colors from one set of values to another. Think of them as color presets for video. A RED LUT is designed to emulate the color characteristics of a RED camera.
* Why use RED LUTs on Nikon footage? While your Nikon has its own color science, you might want to use a RED LUT for several reasons:
* Matching: If you're mixing footage from a Nikon and a RED camera, a RED LUT can help create a more consistent look.
* Aesthetic: You might simply prefer the color style that a particular RED LUT provides.
* Starting Point: RED LUTs can be a good starting point for your grade, providing a solid foundation to build on.
* Important Considerations:
* Not a Magic Bullet: LUTs aren't a one-click fix. They're a tool that needs to be used thoughtfully. The best results come from having well-exposed and properly white-balanced footage.
* Exposure and White Balance: Get your exposure and white balance as accurate as possible in-camera. This makes LUT application much easier and more predictable.
* Shooting Profile: The shooting profile you use on your Nikon camera is crucial. The goal is to capture as much dynamic range and color information as possible so the LUT has something to work with.
Shooting on Your Nikon Mirrorless (Key for Good Results)
This is the most important part. How you shoot affects how well the LUT performs.
1. Choose a Flat Picture Profile (Log-like):
* N-Log (Nikon's Log Profile): This is the *best* option if your camera supports it. N-Log is designed to maximize dynamic range and gives you the most flexibility in post-production. It's the closest you'll get to a RAW-like experience with a Nikon.
* Flat Picture Profile: If your camera doesn't have N-Log, use the "Flat" picture profile. This minimizes in-camera sharpening, contrast, and saturation, providing a flatter image that's easier to grade.
* Why Flat? Flat profiles preserve highlight and shadow detail that would be clipped with a more contrasty profile. The LUT can then bring back the contrast and color.
2. Disable In-Camera Processing:
* Turn off or minimize:
* Sharpening: You can add sharpening in post-production with more control.
* Contrast: The Flat profile already reduces contrast.
* Saturation: Similar to contrast, let the LUT handle saturation.
* Vignette Control/Compensation: Disable this, as it can interfere with color grading.
* Active D-Lighting/Dynamic Range Optimizer: Turn these *off* when shooting N-Log or a Flat profile. They alter the image in ways that make grading more difficult.
3. Expose Correctly (or Slightly Over):
* ETTR (Expose To The Right): Slightly overexposing your footage (without clipping highlights) is generally recommended when shooting with a log-like profile. This maximizes the signal-to-noise ratio, especially in the shadows, and helps avoid banding. Use your camera's histogram to monitor your exposure. Aim to keep the waveform slightly to the right, but *not* hitting the top of the graph.
* Use Zebras: Set up zebras in your camera to alert you when you're clipping highlights.
4. Set Your White Balance:
* Custom White Balance: The most accurate option. Use a gray card or white balance target.
* Kelvin: If you can't use a target, set a manual Kelvin temperature.
* Avoid Auto White Balance: Auto white balance can shift during the shot, making grading inconsistent.
Applying the LUT in Post-Production
You'll need video editing software that supports LUTs. Popular options include:
* DaVinci Resolve (Free and Studio versions): Industry-standard color grading software.
* Adobe Premiere Pro: A widely used video editing software with color correction tools.
* Final Cut Pro X: Apple's professional video editing software.
Here's the general workflow (specific steps may vary slightly depending on your software):
1. Import Your Footage: Import the footage you shot on your Nikon into your video editing software.
2. Create a New Sequence/Timeline: Set up a timeline with the appropriate resolution and frame rate.
3. Apply a Color Space Transform (if needed):
* For N-Log footage: You might need to apply a color space transform *before* the LUT to convert the N-Log footage to a standard color space like Rec. 709 or Rec. 2020. This helps the LUT work correctly. DaVinci Resolve has specific N-Log input transforms. Check your software's documentation.
* For Flat Picture Profile footage: This step might not be necessary. Try applying the LUT directly first.
4. Apply the RED LUT:
* DaVinci Resolve:
* Go to the Color page.
* Create a new node.
* Right-click the node and select "3D LUT" -> "Select LUT..."
* Navigate to your RED LUT file (usually .cube files) and select it.
* Adobe Premiere Pro:
* Open the Lumetri Color panel.
* In the Basic Correction section, find the "Input LUT" dropdown.
* Select "Browse..." and navigate to your RED LUT file.
* Final Cut Pro X:
* Open the Inspector window.
* In the Color section, find the "Custom LUT" dropdown.
* Choose "Choose Custom LUT..." and navigate to your RED LUT file.
5. Adjust the Intensity (Mix) of the LUT:
* Most software allows you to adjust the strength or opacity of the LUT. This is crucial! Applying a LUT at 100% often looks too strong. Start with a lower value (e.g., 50%) and then adjust to taste. In DaVinci Resolve, this is often done by adjusting the "Key Output" for the node the LUT is applied to. In Premiere Pro, it's often a slider within the Lumetri Color panel.
6. Make Further Adjustments (Color Grading):
* The LUT is a starting point, not the final grade. You'll likely need to make further adjustments to:
* Exposure: Fine-tune the overall brightness.
* Contrast: Add or reduce contrast to suit your aesthetic.
* White Balance: Make any necessary adjustments.
* Saturation: Adjust the intensity of the colors.
* Shadows, Midtones, Highlights: Use lift, gamma, gain (or similar controls) to adjust these individually.
* Curves: For precise control over the tonal range.
* HSL (Hue, Saturation, Luminance): To adjust specific colors.
7. Use Scopes (Waveform, Vectorscope, Histogram):
* Scopes are your best friends in color grading. They provide objective measurements of your image's color and luminance, helping you avoid errors and make informed decisions.
8. Experiment with Different LUTs:
* There are many different RED LUTs available, each with its own unique look. Experiment to find the ones that you like best and that work well with your footage.
9. Create a Look Book: As you find LUTs and create looks that you like, save them as presets. This will save you time in future projects.
Example Workflow in DaVinci Resolve (Most Common for Grading)
1. Import footage into DaVinci Resolve.
2. Create a timeline.
3. Go to the "Color" page.
4. Right-click in the Node editor area and add a new node. This will be Node 1.
5. If you shot N-Log footage:
* Add *another* new node *before* Node 1. (Right-click in the node editor, select "Add Serial Before").
* In the "Color Space Transform" OFX plugin (search for it in the OpenFX palette on the left), configure it as follows:
* Input Color Space: Nikon N-Log
* Input Gamma: N-Log
* Output Color Space: Rec.709 (or Rec.2020 if your delivery is for HDR)
* Output Gamma: Gamma 2.4 (or ST.2084 for HDR)
* Connect this "Color Space Transform" node to the input of Node 1. Node 1 is where you'll apply the LUT.
6. Right-click on Node 1 and select "3D LUT" -> "Select LUT..." Choose your RED LUT.
7. Adjust the Key Output value for Node 1. This controls the intensity of the LUT. Start at 0.5 (50%) and adjust from there. You can also adjust the Gamma (Midtone) values here if you need it.
8. Add more nodes after Node 1 for further color grading adjustments (exposure, contrast, saturation, etc.).
Where to Find RED LUTs
* Official RED Website: RED often provides LUTs for their cameras, but they may not be freely available for download.
* Online Marketplaces: Websites like Gumroad, Creative Market, and FxFactory offer a variety of RED LUTs (both free and paid).
* LUT Packs: Many colorists sell collections of LUTs designed for specific looks.
* Free LUTs: Search online for "free RED LUTs." Be cautious when downloading from unknown sources. Stick to reputable websites.
Important Tips
* Start Simple: Don't try to do too much at once. Focus on getting the exposure and white balance right, and then apply the LUT.
* Iterative Process: Color grading is an iterative process. You'll likely go back and forth between different adjustments until you get the look you want.
* Learn Your Software: Take the time to learn the color grading tools in your video editing software.
* Practice, Practice, Practice: The more you practice, the better you'll become at color grading.
By following these steps and practicing regularly, you can effectively use RED LUTs to enhance the look of your Nikon mirrorless footage and achieve a more cinematic color grade. Remember to prioritize proper shooting techniques and to use the LUT as a tool to guide your creative vision, not as a substitute for good color grading skills. Good luck!