1. Gear You'll Need:
* Speedlights or Strobes: You'll need lights powerful enough to shine through the gels. Speedlights (external flashes) are a good starting point. Strobes are more powerful and often have more advanced features.
* Colored Gels: These are sheets of transparent colored plastic that you attach to your lights. You can buy gel kits or individual gels. Popular brands include Rosco and Lee Filters.
* Gel Holders/Clips/Tape: You need a way to attach the gels to your lights. Some speedlights come with gel holders, or you can use clothespins, gaffer's tape (it's heat-resistant), or specialized gel clips.
* Light Stands (at least 2): To position your lights independently.
* Modifiers (optional): Softboxes, umbrellas, snoots, grids, reflectors can all be used to shape and control the light with and without gels.
* Background (optional): Consider the color and texture of your background. A neutral background (white, gray, black) works best initially so the gels can have maximum impact.
* Camera and Lens: Choose a lens that suits portraiture (e.g., 50mm, 85mm, 135mm).
* Optional: Light Meter: A light meter can help you precisely measure the light output of your flashes.
2. Understanding Gels & Color Theory:
* Color Temperatures: Gels can be used to correct or alter color temperature. For example, a CTO (Color Temperature Orange) gel warms the light, while a CTB (Color Temperature Blue) gel cools it.
* Color Harmony: Learn basic color theory.
* Complementary Colors: Colors opposite each other on the color wheel (e.g., red and green, blue and orange) create contrast and visual interest.
* Analogous Colors: Colors that are next to each other on the color wheel (e.g., blue, blue-green, green) create a harmonious and soothing effect.
* Triadic Colors: Three colors equally spaced on the color wheel (e.g., red, yellow, blue) offer a more vibrant and dynamic look.
* Density/Strength of Gels: Gels come in different densities. A higher density gel will produce a more saturated color and reduce the amount of light passing through.
* Mixing Gels: You can layer gels to create new colors. Experiment with different combinations.
3. Common Lighting Setups with Gels:
* One-Light Setup (Simple & Effective):
* Place your light with the gel to the side or behind your subject, aiming to light their face from the side. This creates a dramatic shadow on the opposite side of the face.
* Use a reflector to bounce light back into the shadows for a softer look.
* Two-Light Setup (Classic & Versatile):
* Key Light: The main light illuminating your subject. Place it at a 45-degree angle to your subject. Use a gel to add color.
* Fill Light: A weaker light, often placed on the opposite side of the key light, used to fill in the shadows. You can use a different colored gel, a reflector, or a bare flash for this.
* Rim Light/Hair Light: Place a light behind your subject with a gel to create a colored outline around them.
* Three-Light Setup (More Control & Complexity):
* Key Light: Main light source, typically gelled.
* Fill Light: Fills in shadows, can be gelled or left ungelled.
* Background Light: Aimed at the background, can be gelled to create a colored background or to separate the subject from the background.
4. Steps to Shooting with Gels:
1. Plan Your Concept: Decide on the mood and story you want to tell with your portrait. This will inform your color choices.
2. Set Up Your Lights: Position your lights according to your chosen setup (one-light, two-light, etc.).
3. Attach the Gels: Secure the gels to your lights. Make sure they are properly attached and not blocking the flash sensor (if applicable).
4. Set Camera Settings:
* ISO: Keep it as low as possible to minimize noise (e.g., ISO 100 or 200).
* Aperture: Choose an aperture based on your desired depth of field (e.g., f/2.8 for a shallow depth of field, f/8 for more sharpness).
* Shutter Speed: Set your shutter speed to the flash sync speed of your camera (usually around 1/200th or 1/250th of a second).
* White Balance: This is important. You can use "Flash" white balance as a starting point. You can also shoot in RAW and adjust the white balance in post-processing. You might also experiment with setting the white balance based on the gel color for interesting effects.
5. Set Flash Power: Start with a low flash power setting and gradually increase it until you achieve the desired exposure. Use a light meter for precision, or chimp (review shots on the back of your camera) and adjust. Remember that gels will reduce the amount of light output, so you may need to increase the flash power.
6. Take Test Shots: Take several test shots and adjust your light positions, flash power, and camera settings as needed.
7. Adjust Gel Positions/Angles: Experiment with the angle and distance of your lights to control the spread and intensity of the color.
8. Pose Your Subject: Direct your subject to create the desired mood and expression.
9. Shoot and Review: Continuously review your images and make adjustments as needed.
10. Post-Processing: Fine-tune the colors, contrast, and sharpness in post-processing using software like Adobe Lightroom or Photoshop.
5. Tips and Tricks:
* Start Simple: Begin with one or two lights and simple gel combinations before moving on to more complex setups.
* Experiment with Placement: Don't be afraid to move your lights around and try different angles.
* Use a Grid: A grid attached to your light will narrow the beam of light and prevent light spill.
* Diffusion: Use a diffuser (e.g., a softbox or umbrella) to soften the light and create a more flattering look.
* Mixing Gels with Ambient Light: Try combining colored gels with natural or artificial ambient light for interesting effects. This is more challenging but can create unique looks.
* Underexpose the Ambient: Often, underexposing the ambient light slightly will make the gelled colors pop more.
* Consider Skin Tone: Some gel colors can be unflattering on certain skin tones. Test different colors to see what works best for your subject.
* Use Colored Backdrops: Instead of gelling the lights pointed at the background, you could use a colored seamless paper or fabric backdrop. This can save you gels and potentially be easier to control.
* Focus on the Eyes: The eyes are the most important part of a portrait. Make sure they are sharp and well-lit.
* Practice, Practice, Practice: The more you experiment with gels, the better you'll become at using them to create stunning portraits.
* Safety: Be careful not to overheat your flash. Avoid using high-density gels for extended periods at high power levels, as this can damage your equipment. Use heat-resistant tape and holders.
* Embrace Mistakes: Sometimes the most interesting results come from unexpected errors. Don't be afraid to experiment and push the boundaries.
Example Gel Combinations for Different Moods:
* Dramatic/Mysterious: Teal and orange, blue and purple.
* Warm/Romantic: Pink and orange, gold and amber.
* Cool/Modern: Blue and green, cyan and magenta.
* Retro/Vintage: Yellow and red, sepia tones.
By understanding the fundamentals of lighting, color theory, and a bit of experimentation, you can use colored gels to transform your portraits into unique and captivating works of art. Good luck and have fun!