1. Understanding the Basics
* What are Gels? Colored gels are thin, transparent sheets of colored plastic (usually made of polyester or polycarbonate) placed in front of a light source to change its color.
* Where to get them: Photography stores, online retailers (Amazon, B&H), and even some theatrical supply stores carry gels. Look for "lighting gels" or "color correction gels."
* Gel Sizes: Gels come in various sizes. Consider the size of your light source when selecting gels. Larger strobes need larger gels.
* Gel Holders: You'll need a way to attach the gels to your lights. There are dedicated gel holders that attach to strobes or speedlights. Alternatives include gaffer tape (heat resistant) or even clips. Don't completely cover the light if it's getting hot, though, to avoid melting the gel.
* Strobe vs. Continuous Lighting: Gels work with both strobes (flashes) and continuous lights (LED panels, etc.). Strobes offer more power for overcoming ambient light and freezing motion, but continuous lights allow you to see the color effect in real-time, which can be easier for beginners. Be careful with gels on hot lights, as they can melt.
2. Color Theory for Portraits
* Complementary Colors: Colors opposite each other on the color wheel (e.g., blue and orange, red and green, yellow and purple) create visual contrast and excitement. Using these in combination can make your subject "pop."
* Analogous Colors: Colors that are next to each other on the color wheel (e.g., blue, blue-green, green) create a harmonious and calming effect.
* Monochromatic: Using different shades or tones of the same color (e.g., light blue, medium blue, dark blue) can create a stylish and elegant look.
* Color Temperature: Gels can also be used to correct or alter color temperature. CTO (Color Temperature Orange) gels warm the light, while CTB (Color Temperature Blue) gels cool it.
* Skin Tone Considerations: Be mindful of how different colors interact with skin tones. Some colors can make skin look sickly or washed out. Experiment and observe the results. Generally, warmer colors like oranges, yellows, and reds tend to be more flattering. Cool colors can work well, but require more careful balancing with other elements.
3. Basic Gel Setups and Techniques
* Single Gel - Main Light: Put a colored gel on your main light (the key light). This will bathe the entire subject in that color. Good for bold, dramatic looks. Experiment with different gel densities (how dark the gel is) for more or less saturated color.
* Single Gel - Background Light: Place a gelled light behind the subject, aimed at the background. This creates a colored backdrop and helps separate the subject.
* Two Gels - Split Lighting: Use two lights, each with a different colored gel, to illuminate the subject from opposite sides. This creates a striking, colorful shadow effect. Classic combinations include:
* Blue & Orange (or Yellow)
* Red & Cyan
* Pink & Teal
* Three Gels (or More): Get ambitious! Use a main light with a gel, a fill light with a different gel, and a background light with yet another. This gives you a lot of control, but requires careful balancing to avoid a chaotic look.
* Gelled Rim Light/Hair Light: Place a gelled light behind the subject to create a colored rim light that highlights the edges of their hair and shoulders, separating them from the background.
* Subtle Gels: Don't always go for super saturated colors. Lightly tinted gels can create a more subtle and sophisticated effect, enhancing the existing color palette of your scene.
* Using Grids and Snoots: Adding a grid or snoot to your gelled light will narrow the beam of light, allowing you to be more precise with where the color falls. Great for highlighting specific areas of the face or body.
* Using Gobos with Gels: Gobos (patterned stencils) can be combined with gels to project colored patterns onto the subject or background.
4. Practical Tips for Success
* Start Simple: Begin with one or two gel setups and gradually work your way up to more complex arrangements.
* Test Shots are Crucial: Take plenty of test shots to see how the gels are affecting the light and the subject's skin tone. Adjust your camera settings (white balance, exposure) as needed.
* White Balance: Your white balance will be greatly affected by gels.
* Auto White Balance (AWB): Often struggles with gels and will try to correct the color, defeating the purpose.
* Custom White Balance: The most accurate option. Use a gray card or white balance target under the gelled light to set a custom white balance in your camera.
* Manual White Balance (Preset): Select a white balance preset that is close to the color of your gel (e.g., "Tungsten" for CTO gels).
* Shoot Raw: Shooting in raw format gives you the most flexibility to adjust the white balance in post-processing.
* Exposure: Gels reduce the amount of light reaching the sensor, so you may need to increase your ISO, widen your aperture, or increase the power of your lights.
* Consider the Background: The color of your background will also affect the overall look of the portrait. A neutral background will allow the gel colors to stand out more.
* Post-Processing: You can further refine the colors and tones in post-processing. Use color grading tools to adjust the hue, saturation, and luminance of the colors.
* Safety First: Use heat-resistant gels and never leave lights unattended. Ensure gels aren't touching the bulb directly.
* Experiment! The best way to learn is to experiment with different colors, placements, and combinations. Don't be afraid to try something unconventional!
* Practice Color Matching: If you are trying to create a specific color scheme, use a color chart (Pantone) to ensure the gels you choose match your vision.
* Consistency is Key: When using multiple lights with gels, keep the distance of each light source from the subject consistent to maintain consistent color intensity.
* Use a Light Meter: If you are working with complex setups, a light meter can help you accurately measure the light output of each light source and ensure proper exposure.
Example Scenarios:
* Cyberpunk/Retro: Teal and magenta gels, dark background, graphic makeup.
* Dreamy/Ethereal: Pastel pink and lavender gels, soft lighting, flowy clothing.
* Dramatic/Noir: Red and blue gels, harsh shadows, contrasting textures.
* Underwater Effect: Blue and green gels, subtle diffusion, slow shutter speed for motion blur.
* Fire/Ice: Orange/red and blue gels, contrast the warmth and coolness of the elements.
By understanding the basics of color theory and experimenting with different gel setups, you can create stunning and unique portraits that express your artistic vision. Have fun!