1. Understanding the Basics of Colored Gels:
* What are Colored Gels? They are transparent sheets of colored plastic or polycarbonate designed to be placed in front of light sources to change the color of the light.
* Types of Gels:
* Correction Gels: Used to correct or balance color temperature (e.g., CTO (Color Temperature Orange) to warm up a daylight flash, CTB (Color Temperature Blue) to cool down a tungsten light).
* Creative/Color Effect Gels: Used for artistic color effects (e.g., blues, greens, reds, magentas, etc.).
* Neutral Density (ND) Gels: Reduce the intensity of the light without changing its color. Useful for balancing exposure when using multiple light sources.
* Gel Strengths/Saturation: Gels come in varying degrees of saturation, affecting how intensely they change the light's color. Full gels are highly saturated, while half and quarter gels offer more subtle effects.
* Gel Sizes: Gels are typically sold in large sheets that you can cut to fit your light modifiers.
* Gel Holders: You need a way to attach the gels to your lights. Common methods include:
* Gel Frames: Metal or plastic frames that clip onto the front of strobes or continuous lights.
* Gaffer Tape: Heat-resistant gaffer tape is used to secure gels to reflectors, speedlights, or other light sources. *Be careful not to cover ventilation holes on strobes/speedlights as overheating can damage them.*
* Specific Gel Holders: Some light modifiers (e.g., softboxes, beauty dishes) come with integrated gel holders.
* Light Sources: Gels can be used with strobes (studio flashes), speedlights (on-camera flashes), and continuous lights (LEDs, tungsten). *Be cautious with tungsten lights as they generate a lot of heat and can melt or distort gels not specifically designed for hot lights.* LED lights are generally the safest option for heat-sensitive gels.
2. Gear You'll Need:
* Colored Gels: A variety of colors is ideal. Start with a basic set of primary and secondary colors. Rosco and Lee Filters are reputable brands.
* Light Sources: At least one, preferably two or three strobes or speedlights.
* Light Stands: To position your lights.
* Light Modifiers: Reflectors, softboxes, umbrellas, grids, snoots. These shape and control the light, enhancing the effect of the gels.
* Gel Holders or Gaffer Tape: To attach the gels to your lights.
* Light Meter (Optional): To accurately measure the light output and color temperature.
* Camera with Manual Mode: You'll need to control your camera settings (aperture, shutter speed, ISO, white balance) to achieve the desired results.
* Remote Trigger (for off-camera flashes): To fire your flashes remotely.
* Model: (Or willing subject).
3. Basic Techniques and Setups:
* Single Gel: The simplest setup. Place a gel over a single light source to bathe your subject in a specific color.
* *Effect:* Creates a monochromatic or stylized look. Good for mood and emphasis.
* *Example:* A red gel for a dramatic, edgy portrait, or a blue gel for a cool, melancholic feel.
* Two Gels: Opposing Colors: Place two lights, each with a different colored gel, on either side of your subject.
* *Effect:* Adds depth and dimension. Creates a complementary or contrasting color scheme.
* *Example:* A blue gel on one side and an orange gel on the other. This creates a visual dynamic and emphasizes the subject's features.
* Two Gels: Background and Subject: One light with a gel on the subject, and another light with a different gel on the background.
* *Effect:* Separates the subject from the background and creates a striking visual.
* *Example:* A warm gel (e.g., yellow or orange) on the subject and a cool gel (e.g., blue or green) on the background.
* Three Gels (or More): More complex setups, allowing for greater creativity. Consider adding a third gel as a hair light or to further emphasize specific areas.
* *Effect:* Creates intricate color patterns and highlights.
* *Example:* Key light with no gel, rim light with a red gel, background light with a blue gel.
* Graduated Gels: Gels that transition from one color to another. Great for smooth transitions on the background.
4. Creative Approaches and Ideas:
* Complementary Colors: Use colors that are opposite each other on the color wheel (e.g., blue and orange, red and green, yellow and violet). This creates a vibrant and dynamic contrast.
* Analogous Colors: Use colors that are next to each other on the color wheel (e.g., blue, blue-green, and green). This creates a harmonious and soothing effect.
* Monochromatic: Use different shades and tones of a single color for a unified and stylish look.
* Color Blocking: Use strong, contrasting colors to create bold and graphic images.
* Silhouettes: Place a gelled light behind the subject to create a silhouette against a colored background.
* Dual Lighting/Split Lighting: Use one color on one side of the face and another color on the other side, creating a dramatic and visually striking effect.
* Gobo Effects with Gels: Combine gels with gobos (stencils) to project colored shapes and patterns onto your subject or background.
* Experiment with Intensity: Use different strengths of gels (full, half, quarter) to fine-tune the color intensity and create subtle or dramatic effects.
* Mixing Gels: Combine two or more gels on a single light to create custom colors. For example, layering a blue and yellow gel will create a green light.
5. Camera Settings and Considerations:
* Shoot in Manual Mode: This gives you complete control over exposure and white balance.
* White Balance: Adjust your white balance to match the color temperature of your lights. You may need to experiment to find the best setting. *Custom white balance* is ideal, allowing you to precisely set the color temperature. If shooting RAW, you can adjust the white balance in post-processing. Consider using a gray card to set a custom white balance.
* Aperture: Choose an aperture that suits your desired depth of field. Wider apertures (e.g., f/2.8, f/4) will create a shallow depth of field, blurring the background and isolating the subject.
* Shutter Speed: Adjust your shutter speed to control the ambient light in the scene. Typically, you'll use a shutter speed at or below your camera's sync speed (e.g., 1/200th or 1/250th of a second) to properly sync with your flashes.
* ISO: Keep your ISO as low as possible (e.g., ISO 100) to minimize noise.
* Metering: Use your camera's light meter to get a base exposure. Then, adjust your flash power to achieve the desired effect. A handheld light meter provides more accurate readings, especially when using multiple light sources.
* Flash Power: Adjust the power of your flashes to control the brightness and intensity of the colored light. Gels will reduce the light output, so you may need to increase the flash power to compensate.
6. Post-Processing:
* RAW Format: Shooting in RAW gives you the most flexibility in post-processing.
* White Balance Correction: Fine-tune the white balance if needed.
* Color Grading: Enhance the colors and create a cohesive look. You can adjust the hues, saturation, and luminance of individual colors.
* Contrast and Tone: Adjust contrast and tone to create a balanced and visually appealing image.
* Sharpening: Apply sharpening to enhance details and bring out textures.
7. Tips and Tricks:
* Experiment! The key to mastering colored gels is to experiment with different colors, lighting setups, and camera settings.
* Start Simple: Begin with basic setups and gradually increase complexity.
* Use a Hair Light: A gelled hair light can add dimension and separation to your subject.
* Consider the Background: Choose a background that complements the colors you're using. A neutral background (e.g., gray, white, black) will allow the colors to stand out.
* Communicate with Your Model: Let your model know what you're trying to achieve and guide them on posing and expressions that match the mood you're creating.
* Safety First: Be careful when using gels with hot lights. Ensure that the gels are heat-resistant and that you're not blocking ventilation holes.
By understanding the principles of color theory, experimenting with different techniques, and practicing regularly, you can create stunning and imaginative portraits using colored gels. Have fun exploring the endless possibilities!