1. Understanding the Basics: What are Gels and Why Use Them?
* What are Gels? Transparent sheets of colored plastic (usually made of polyester or polycarbonate) that are placed in front of a light source to alter the color of the light it emits.
* Why use them?
* Color Harmony & Contrast: Create visually appealing palettes by combining colors.
* Mood and Emotion: Evoke specific feelings through color psychology.
* Separation and Dimension: Highlight the subject or background with color.
* Creative Effects: Add abstract splashes of color or transform a scene.
* Correcting Light: Correct white balance when mixing light sources (e.g., tungsten and daylight). Though primarily used for creative effects in portraits.
2. Essential Equipment
* Colored Gels: Purchase a set of gels from a reputable photography supplier. Lee Filters and Rosco are popular brands. Start with a basic set containing primary colors (red, green, blue), complementary colors (cyan, magenta, yellow), and some neutral density gels.
* Light Source(s): Speedlights (flashes), strobes, or even constant lights can be used. Speedlights are often the most accessible.
* Gel Holders: These attach to your light source and securely hold the gels in place. Options include:
* Gel Bands: Simple rubber bands that hold the gel directly to the flash head.
* Gel Clips: Clip-on holders that offer a more secure attachment.
* Dedicated Gel Holders/Modifiers: These can be more expensive but provide the most reliable and versatile option.
* Light Stands: To position your lights independently.
* Light Modifiers (optional): Softboxes, umbrellas, snoots, grids to control the shape and quality of the light.
* Clamps/Tape: To secure gels if your holder isn't perfect.
* Optional, but helpful: A gray card for setting white balance in post-processing.
3. Key Techniques and Setups
* Single Light with Gel:
* Simple Color Wash: Place a gelled light pointed directly at the subject. This will bathe them in a single color. Experiment with different angles and intensities.
* Background Color: Place a gelled light behind the subject, aimed at the background to create a colored backdrop. This is great for silhouettes or separating the subject.
* Key Light and Rim Light: Use a gelled light as the key light (main source) and a second gelled light as a rim light (highlighting the edges of the subject).
* Two Lights with Gels:
* Complementary Colors: Use two lights with complementary gels (e.g., blue and orange, red and green) on opposite sides of the subject. This creates visual tension and a dynamic look.
* Split Lighting: Place one gelled light on one side of the subject and leave the other side unlit or use a reflector to bounce some of the gelled light back in.
* Background and Subject: One light with a gel on the background and another with a different gel on the subject. This allows you to independently control the colors.
* Three or More Lights with Gels:
* Complex Color Combinations: Experiment with multiple colors and angles to create intricate lighting patterns.
* Separation and Dimension: Use different colored rim lights to highlight different parts of the subject.
* Accent Lights: Add small pops of color to specific areas of the subject or background.
4. Color Psychology and Creating Mood
* Warm Colors (Red, Orange, Yellow): Evoke feelings of warmth, energy, passion, excitement, and aggression. Use sparingly, as they can easily overpower a scene.
* Cool Colors (Blue, Green, Purple): Convey calmness, serenity, sadness, mystery, and melancholy. Blue is often considered a safe and versatile choice.
* Neutral Colors (White, Gray, Black): Represent balance, neutrality, sophistication, and sometimes emptiness. These are often used as a base to build upon with colored lights.
* Consider the Model's Skin Tone: Certain colors will flatter certain skin tones better than others. Generally, warmer skin tones look good with warmer colors, and cooler skin tones look good with cooler colors. Experiment to find what works best.
5. Practical Tips and Considerations
* Start Simple: Begin with one or two lights and gradually add complexity as you gain experience.
* Test Shots: Always take test shots to check your lighting and color balance. Use a gray card to accurately set white balance in post-processing.
* Power Settings: Adjust the power of your lights to control the intensity of the color. Lower power settings can create more subtle effects.
* Distance: The distance between the light and the subject affects the spread and intensity of the color. Closer distances create a more concentrated and intense effect.
* Diffusion: Use diffusers (softboxes, umbrellas) to soften the light and create a more even color wash.
* Metering: Metering with colored gels can be tricky. Use a light meter if you have one, or rely on your camera's histogram and adjust settings accordingly.
* White Balance: Your camera's white balance will be affected by the gels. You can either adjust the white balance in-camera to compensate, or leave it on "auto" and correct it in post-processing. Shooting in RAW is highly recommended for maximum flexibility in post.
* Hair Color: Dark hair absorbs more light and color than light hair.
* Wardrobe: Consider the color of the model's clothing and how it will interact with the gels. Neutral clothing is generally a good choice.
* Safety: Don't leave lights unattended, especially with gels attached. Some gels can melt or warp if they get too hot.
* Experiment! The most important thing is to experiment and find what works best for you. Don't be afraid to try different combinations of colors, angles, and light modifiers.
6. Post-Processing
* White Balance Correction: Correct the white balance using a gray card or by adjusting the temperature and tint sliders in your editing software.
* Color Grading: Fine-tune the colors to achieve your desired look.
* Dodge and Burn: Use dodge and burn techniques to enhance highlights and shadows.
* Retouching: Remove any blemishes or distractions.
Example Setups
* Retro Glam: One light with a red gel behind the subject aimed at the background, and a second light with a magenta gel as a key light. Poses and wardrobe with a retro vibe.
* Sci-Fi: Two lights with blue and green gels on opposite sides of the subject, creating a futuristic look. Use dark clothing and a serious expression.
* Dreamy Portrait: A single light with a lavender gel, diffused through a softbox. Use soft, flowing clothing and a relaxed pose.
By understanding the principles of color, light, and composition, you can use colored gels to create stunning and unique portraits that express your artistic vision. Good luck and have fun experimenting!