1. Understanding the Basics:
* What are gels? Colored gels (or filters) are thin sheets of colored plastic that you place in front of your light source to change its color. They come in a wide range of colors and densities.
* Why use them?
* Drama and Emotion: Gels can evoke specific emotions and add drama to your images.
* Color Harmony/Contrast: Create visually appealing combinations of colors.
* Artistic Expression: Unleash your creativity and create unique and memorable portraits.
* Correcting Color: Although less common now with digital white balance, gels can still be used to warm up or cool down light.
* Light Sources: You can use gels with various light sources:
* Strobes/Speedlights: These are the most common. They provide strong bursts of light and are relatively easy to work with.
* Continuous Lights (LEDs, Halogen): Choose lights that don't produce excessive heat, as heat can melt or damage some gels. LEDs are generally a good choice.
* Natural Light (with a reflector): While you can't directly gel natural light, you can use a reflector covered with a gel to bounce colored light onto your subject. This is a subtle effect.
2. Essential Equipment:
* Colored Gels: A set of gels in various colors. Rosco and Lee Filters are reputable brands. Consider a starter kit with primary colors, plus a few complementary and skin-tone friendly options (e.g., CTO - color temperature orange, CTB - color temperature blue).
* Light Source (Strobe/Speedlight/LED): As discussed above.
* Gel Holders/Speedlight Gels: Clips, bands, or magnetic attachments designed to hold gels securely in front of your light source. Some speedlights have built-in gel holders.
* Light Stands: To position your lights.
* Modifiers (Optional): Softboxes, umbrellas, grids, snoots. These shape and control the light further.
* Light Meter (Optional): Helps you precisely measure the light output.
* Reflector (Optional): To bounce light back onto your subject and fill shadows.
3. Planning Your Shoot:
* Concept: Start with a clear vision. What mood or story do you want to convey? Consider the subject's personality, the desired aesthetic, and the colors that will help you achieve your goal.
* Color Palette: Decide which colors you want to use and how they will interact.
* Complementary Colors: Colors opposite each other on the color wheel (e.g., blue and orange, red and green) create a strong contrast.
* Analogous Colors: Colors next to each other on the color wheel (e.g., blue, blue-green, green) create a harmonious and soothing effect.
* Monochromatic: Different shades of the same color create a subtle and elegant look.
* Lighting Setup: Plan the placement of your lights. Will you use one light, two lights, or more? Where will the shadows fall?
* Model Communication: Clearly communicate your vision to your model so they can understand the mood you're trying to create and pose accordingly.
4. Common Lighting Setups with Gels:
* Single Light with Gel: The simplest setup. Place one light with a gel in front of your subject. This creates a dramatic, single-colored effect. Experiment with the angle and distance of the light to control the shadows.
* Two Lights, Two Colors: A classic and versatile setup.
* Side Lighting: Place one light with one color on one side of the subject and another light with a different color on the other side. This creates a split lighting effect with two distinct colors.
* Key Light and Hair Light/Background Light: Use one light as a key light (main light) with a neutral or slightly warm gel. Use the second light with a more saturated gel to highlight the hair or light the background.
* Three Lights or More: More complex setups allow for greater control. You can use one light for the background, one for the key light, and another for the hair light, each with a different gel.
5. Techniques and Tips:
* White Balance: When using gels, set your camera's white balance *after* adding the gels. Use a custom white balance setting to ensure accurate color rendition. Experiment with different white balance settings to see how they affect the colors.
* Exposure: Gels reduce the amount of light reaching the sensor. Increase your ISO, widen your aperture, or increase the power of your light to compensate. Take test shots to get the exposure right.
* Diffusion: Using a softbox or umbrella in front of your gelled light will soften the light and create smoother transitions between colors.
* Distance: The further the light source is from your subject, the more diffused the light will be.
* Color Intensity: You can control the intensity of the color by:
* Gel Density: Some gels are more saturated than others.
* Distance: Moving the light source further away will decrease the color intensity (especially with focused light).
* Power: Adjusting the power of your strobe/speedlight will also affect the intensity.
* Experiment! Don't be afraid to try different combinations of colors, lighting setups, and modifiers. The best way to learn is by experimenting.
* Skin Tones: Be mindful of how the gels affect skin tones. Harsh colors can make skin look unnatural. You may need to use warming gels (CTO) or less saturated colors to achieve pleasing skin tones. Consider using a neutral or slightly warmed key light and using colored gels only on the background or as accent lights.
* Blending Colors: Overlapping the light from two different colored gels can create a third color.
* Backgrounds: Consider using a neutral background (white, gray, black) to allow the colors to stand out. You can also gel the background itself for a more dramatic effect.
* Post-Processing: You can fine-tune the colors and adjust the overall look of your images in post-processing software like Adobe Photoshop or Lightroom. However, it's best to get the colors as close to your desired look in-camera as possible.
* Safety: Don't place gels too close to hot lights (especially halogen) as they can melt or catch fire.
Example Scenarios:
* Cyberpunk/Futuristic: Use neon pink and cyan gels with hard light for a high-contrast, edgy look.
* Dreamy/Ethereal: Use soft pastel colors (e.g., lavender, light blue, pink) with diffused light for a dreamy and romantic feel.
* Dramatic/Moody: Use deep reds, blues, and greens with strong shadows to create a dramatic and moody portrait.
* Warm and Inviting: Use CTO (color temperature orange) or amber gels to create a warm and inviting portrait.
Key Takeaways:
* Planning is essential. Visualize the final result before you start shooting.
* Experiment with different colors, lighting setups, and modifiers.
* Pay attention to skin tones and adjust your colors accordingly.
* Have fun and let your creativity guide you!
By following these guidelines and experimenting with different techniques, you can use colored gels to create truly unique and creative portraits that stand out from the crowd. Good luck!