1. Understanding Colored Gels:
* What are they? Thin sheets of colored plastic (usually acetate or polyester) designed to filter the light emitted from strobes or continuous light sources.
* Why use them? To alter the color of light, creating various effects:
* Adding Mood: Warm colors (reds, oranges, yellows) evoke feelings of warmth, passion, or anger. Cool colors (blues, greens, purples) suggest calm, sadness, or mystery.
* Creating Contrast: Using complementary colors (e.g., blue and orange) can make the subject pop.
* Stylization: To achieve a specific aesthetic, like a cyberpunk or retro vibe.
* Color Correction: To balance different color temperatures (although gels are rarely used for this in portraiture, it's more common in video).
* Gel Numbers/Names: Gels have standardized numbers and sometimes descriptive names (e.g., Rosco E-Color 11 "Minus Green"). Knowing these allows you to replicate specific looks.
* Density/Transmittance: Some gels are more transparent (allowing more light through) than others. Darker gels require higher power settings on your lights.
* Buying Gels: You can buy individual gels, gel swatch books (helpful for choosing colors), or gel kits. Rosco, Lee Filters, and GamColor are reputable brands.
2. Essential Equipment:
* Gels: A selection of colors. Start with a few primaries (red, blue, yellow) and experiment.
* Lights: Strobes (speedlights or studio strobes) or continuous lights. Strobes are generally preferred for power and control. Ensure your lights are compatible with your gels (some lights get too hot for gels). LED lights are generally safer for gels as they produce less heat.
* Gel Holders/Attachments: These attach to your light(s) and hold the gels in place. Common types include:
* Gel Clips: Simple clips that attach directly to the light. Best for small flashes and less powerful lights.
* Gel Frames: Metal or plastic frames that hold the gel and attach to the light.
* Honeycomb Grids with Gel Holders: Offer precise control over light direction and allow for easy gel insertion.
* Snoots with Gel Holders: Similar to grids, but create a focused beam of light.
* Light Stands: To position your lights.
* Light Meter (Optional): Helps you accurately measure light output when using multiple lights with different gels.
* Modifiers (Optional): Softboxes, umbrellas, reflectors, barn doors can further shape and control the light.
* Clamps & Tape: Helpful for securing gels and managing cables.
* Gloves: Prevent fingerprints on gels.
3. Basic Lighting Setups with Gels:
* Single Light with Gel: Simplest setup. Position the light with the gel to the side of your subject for a dramatic, colored highlight on one side of the face. Use a reflector on the opposite side to bounce some light back and fill in shadows.
* Two Lights with Different Gels (Split Lighting):
* Complementary Colors: Place one light with a blue gel on one side and another light with an orange or yellow gel on the other. This creates a striking contrast and makes the subject pop.
* Similar Colors: Use two shades of the same color family (e.g., teal and blue) for a more subtle, monochromatic effect.
* Background Light with Gel: Use a light aimed at the background with a gel to create a colored background. This can be used in combination with another light on the subject (with or without a gel).
* Rim Light with Gel: Place a light behind the subject with a gel to create a colored outline around them. This separates the subject from the background.
* Hair Light with Gel: Similar to a rim light, but focused on the hair to add a pop of color.
4. Key Techniques and Tips:
* Start Simple: Begin with one or two lights and gradually add complexity as you gain experience.
* Experiment with Colors: Don't be afraid to try different color combinations. Use a color wheel as a guide. Think about the emotions you want to evoke.
* Power and Distance: The further your light is from the subject, the less intense the color will be. Increase the power of your light or move it closer to the subject to compensate.
* White Balance: Colored gels will dramatically affect your white balance. You can either:
* Set a Custom White Balance: Use a gray card to set a custom white balance *after* you've applied the gels. This will give you the most accurate colors.
* Adjust in Post-Processing: Shoot in RAW format and adjust the white balance in post-processing. This gives you more flexibility to fine-tune the colors. Many photographers prefer this method to have more control.
* Gel Intensity: Darker gels require more light output. You might need to increase the ISO or widen the aperture on your camera.
* Diffusion: Using a diffuser in front of the gel will soften the light and create a more even spread of color. This is useful for reducing harsh shadows.
* Metering: Use a light meter to accurately measure the light output of each light, especially when using multiple lights with different gels. This will help you balance the exposure and avoid over- or underexposure.
* Color Mixing: You can stack gels to create new colors. Be careful as this can reduce light output significantly.
* Model's Skin Tone: Consider your model's skin tone when choosing colors. Some colors may be more flattering than others.
* Hair Color: Different hair colours will react differently to the gel colours.
* Clothing: The colours in the clothing worn by the model can add or detract from the photograph.
* Post-Processing: Fine-tune the colors, contrast, and saturation in post-processing to achieve your desired look.
* Safety:
* Use gels designed for photography lights. Household plastic will melt.
* Never leave gels unattended on hot lights.
* Handle gels with gloves to prevent fingerprints.
5. Creative Ideas:
* Cyberpunk/Sci-Fi: Use neon colors like blues, purples, and greens. Add fog or smoke for a futuristic atmosphere.
* Film Noir: Use a single light with a deep blue or red gel for dramatic, high-contrast portraits.
* Abstract/Surreal: Experiment with unconventional color combinations and lighting angles. Use multiple gels to create complex color gradients.
* Monochrome with a Pop: Convert your image to black and white, then selectively add color back in with a gel.
* Color Blocking: Use multiple lights with different gels to create distinct blocks of color on the subject and background.
Example Workflow:
1. Plan: Decide on the mood and aesthetic you want to achieve. Choose your colors accordingly.
2. Set Up: Position your lights and attach the gels.
3. Camera Settings: Set your camera to manual mode. Start with a low ISO, a moderate aperture (e.g., f/5.6 or f/8), and adjust the shutter speed to achieve a good exposure.
4. White Balance: Decide whether to set a custom white balance or adjust in post.
5. Test Shots: Take test shots and adjust the power of your lights, the position of the gels, and your camera settings until you are happy with the results.
6. Shoot: Capture your portraits.
7. Post-Processing: Fine-tune the colors, contrast, and saturation in post-processing to achieve your desired look.
Important Considerations:
* Practice: Experimentation is key. The more you practice with colored gels, the better you will understand how they work and how to use them effectively.
* Research: Look at the work of other photographers who use colored gels for inspiration.
* Have Fun! Don't be afraid to break the rules and try new things.
By following these guidelines and experimenting with different techniques, you can create stunning and unique portraits using colored gels. Good luck!