1. Understanding the Basics
* What are Colored Gels? They are transparent or translucent plastic sheets of different colors that you attach to your light sources. They filter the light, changing its color.
* Why Use Gels?
* Color Harmony/Contrast: Create visually appealing color schemes.
* Mood: Evoke specific emotions through color.
* Drama: Add depth and intrigue to your images.
* Separation: Distinguish the subject from the background.
* Visual Interest: Turn an ordinary portrait into something eye-catching.
* Fix Color Issues: CTO/CTB gels can correct for color casts caused by mismatched lighting.
* Types of Gels:
* Color Correction Gels (CTO/CTB): Convert tungsten light to daylight (CTB - Color Temperature Blue) or daylight to tungsten (CTO - Color Temperature Orange).
* Neutral Density Gels (ND): Reduce the intensity of the light without altering its color.
* Color Effect Gels: A wide range of colors (red, blue, green, yellow, magenta, etc.) used for creative effects.
2. Equipment You'll Need
* Lights:
* Strobes/Flashes: Best for powerful, consistent light. They're fast and allow you to overpower ambient light.
* Continuous Lights (LEDs): Easier to see the effect in real-time, good for beginners. Make sure they have good cooling as gels can melt.
* Speedlights (On-Camera Flashes): Portable and convenient, but less powerful.
* Gels: Purchase a gel kit or individual sheets. Rosco and Lee Filters are popular brands.
* Gel Holders/Clips/Tape: Secure the gels to your lights. Gel holders designed for specific lights are ideal. Gaffer tape (heat-resistant) is a good alternative.
* Light Stands: To position your lights.
* Light Modifiers (Optional):
* Softboxes: Create soft, diffused light.
* Umbrellas: Another way to soften the light.
* Snoots/Grids: Focus the light into a narrow beam.
* Light Meter (Optional): For precise light measurements, especially with multiple lights.
* Color Checker (Optional): Help with color correction in post-processing.
3. Planning Your Shoot
* Concept: Determine the mood and message you want to convey. Consider the subject's clothing, makeup, and the overall aesthetic.
* Color Palette: Choose your colors carefully. Consider color theory:
* Complementary Colors: Colors opposite each other on the color wheel (e.g., red and green, blue and orange) create high contrast and energy.
* Analogous Colors: Colors next to each other on the color wheel (e.g., blue, blue-green, green) create a harmonious and peaceful feeling.
* Triadic Colors: Three colors equally spaced on the color wheel (e.g., red, yellow, blue) offer balance and visual interest.
* Lighting Setup: Sketch out your lighting plan. Consider the number of lights, their positions, and the modifiers you'll use.
* Background: Choose a background that complements your chosen colors. A neutral background (white, gray, black) often works well, allowing the gels to be the focus. Colored backgrounds can also be effective, but require careful planning.
4. Setting Up Your Lights and Gels
* Start Simple: Begin with one or two lights to get comfortable.
* Secure the Gels: Attach the gels to your lights using gel holders, clips, or heat-resistant tape. Make sure they're securely fastened to prevent them from falling or melting. Leave some space for ventilation if using hot continuous lights.
* Positioning Your Lights: Experiment with different placements:
* Key Light: The main light source, usually placed to one side of the subject.
* Fill Light: Used to soften shadows created by the key light. Can be a gelled or non-gelled light.
* Background Light: A light pointed at the background to separate the subject. Often gelled to add color to the background.
* Rim Light/Hair Light: Placed behind the subject to create a highlight along the edges, separating them from the background.
* Power Settings: Adjust the power of each light to achieve the desired balance. A light meter can be helpful for precise control.
* Test Shots: Take several test shots and analyze the results. Adjust the lights, gels, and camera settings as needed. Pay attention to color balance and exposure.
5. Shooting Techniques
* One Light with Gel: The simplest approach. Use a single gelled light as the key light and rely on ambient light for fill. You can also bounce the gelled light off a reflector to create a softer, more even light.
* Two Lights, One with Gel: Use one gelled light as the key light and a second, non-gelled light as the fill light. This allows you to control the shadows and highlights more precisely.
* Two Lights, Both with Different Gels: Create more complex color combinations. Experiment with complementary or analogous colors. Be mindful of color mixing and avoid muddy or unpleasant combinations. Example: Blue key light and orange fill light.
* Background Gels: Use gels on lights pointed at the background to create a colored backdrop. Experiment with different colors and patterns.
* Color Blocking: Use hard light sources (like bare flashes) and gels to create distinct blocks of color on the subject and background.
* Split Lighting with Gels: Divide the subject's face with different colored light, creating a dramatic and visually striking effect. Requires careful positioning of the lights.
* Gel Overlays: Hold small pieces of gel close to the lens to create color fringing and dreamy effects.
* Silhouette with Gels: Place a gelled light behind the subject to create a silhouette against a colored background.
6. Camera Settings
* ISO: Keep ISO as low as possible (typically 100) to minimize noise.
* Aperture: Choose an aperture that gives you the desired depth of field. Wider apertures (e.g., f/2.8, f/4) create shallow depth of field, blurring the background. Smaller apertures (e.g., f/8, f/11) create greater depth of field, keeping more of the image in focus.
* Shutter Speed: Adjust the shutter speed to control the ambient light. With strobes, the shutter speed usually needs to be at or below the flash sync speed of your camera. With continuous lights, you can use a wider range of shutter speeds.
* White Balance: Set your white balance appropriately for your light source. If using CTO/CTB gels, you can adjust your white balance to match the corrected color temperature. If using creative color gels, setting a custom white balance may not be as important, as the colors are intentionally manipulated. However, it can help to see a more accurate preview on your camera's LCD screen. Shooting in RAW allows you to adjust the white balance in post-processing.
7. Post-Processing
* Color Correction: Adjust the color balance and saturation as needed.
* Dodging and Burning: Enhance the highlights and shadows to add depth and dimension.
* Retouching: Clean up any blemishes or distractions.
* Color Grading: Fine-tune the colors to achieve the desired look and feel. Use tools like Curves, HSL, and Color Balance in Photoshop or Lightroom.
* Noise Reduction: Reduce noise if necessary, especially if you had to use a high ISO.
Tips and Tricks
* Experiment: Don't be afraid to try new things and push the boundaries of your creativity.
* Start with a Concept: It helps to create the story and the mood you want to convey through the portrait.
* Less is More: Sometimes, a simple gel setup can be more effective than a complex one.
* Control Ambient Light: Dimming the ambient light allows your gelled lights to have a greater impact.
* Use a Hair Light/Rim Light: Adding a gelled hair light can help separate the subject from the background and create a more dramatic look.
* Watch for Color Casts: Be aware that colored gels can affect the color of the subject's skin. Adjust the light and camera settings to minimize unwanted color casts.
* Use Diffusion: Diffusion paper can soften the light for softer look.
* Practice Makes Perfect: The more you experiment with colored gels, the better you'll become at using them effectively.
* Consider your model's skin tone: Some colors look better on some skin tones than others.
* Consider the subject's wardrobe and makeup: Ensure the gels and clothes complement one another.
Safety Precautions
* Heat: Some lights, especially continuous lights, can generate a lot of heat. Use heat-resistant gels and ensure adequate ventilation to prevent them from melting or catching fire.
* Electrical Safety: Always follow proper electrical safety procedures when working with lights. Use grounded outlets and avoid overloading circuits.
By following these guidelines and experimenting with different techniques, you can use colored gels to create truly unique and creative portraits that stand out from the crowd. Good luck and have fun!