1. Understanding Colored Gels
* What are they? Thin sheets of colored plastic (usually acetate or polyester) that you attach to a light source (flash, strobe, or even continuous LED light).
* What do they do? They alter the color of the light emitted, creating different hues and moods.
* Where to get them? Photo supply stores, online retailers (Amazon, B&H), and some theatrical supply stores. Look for "lighting gels" or "color correction gels."
* Types of Gels:
* Color Effects Gels: These are your vibrant colors – reds, blues, greens, yellows, etc. They drastically change the color of the light.
* Color Correction Gels: These subtly adjust the color temperature. For example:
* CTO (Color Temperature Orange): Warms up the light, converting daylight balanced flashes to tungsten-like light.
* CTB (Color Temperature Blue): Cools down the light, converting tungsten light to daylight-like light.
* Neutral Density (ND) Gels: Reduce the intensity of the light without changing the color. Useful when you want to use a wider aperture or longer exposure with flash.
* Gel Sizes: Available in various sizes; choose ones large enough to cover your light source. You can cut larger gels down to size.
* Gel Sets: Often sold in sets with a variety of colors, offering a good starting point. Rosco and Lee Filters are popular brands.
2. Essential Equipment
* Colored Gels: A variety pack is recommended to experiment.
* Light Source(s):
* Speedlights (Flashes): Portable and versatile.
* Strobes: More powerful than speedlights, often preferred for studio work.
* Continuous Lights (LEDs): Good for beginners as you can see the effect in real-time, but typically less powerful.
* Gel Holders/Clips/Tape: Crucial for attaching the gels to your light source. Consider these options:
* Gel Holders: Specific attachments that slide onto flash heads or strobe reflectors.
* Clips: Spring clamps or bulldog clips to hold the gel in place.
* Gaffer's Tape: Heat-resistant tape designed for lighting equipment. *Do not use regular tape, as it can melt and leave residue.*
* Light Stands: To position your lights.
* Light Modifiers (Optional but Highly Recommended):
* Softboxes: Diffuse the light, creating softer shadows.
* Umbrellas: Another diffusion option, generally less precise than softboxes.
* Snoots/Grids: Control the spread of light, creating a more focused beam. Useful for highlighting specific areas.
* Reflectors: Bounce light to fill in shadows.
* Camera: A DSLR or mirrorless camera with manual controls is ideal.
* Lens: A portrait lens (50mm, 85mm, or longer) is recommended.
3. Techniques and Ideas
* Single Light with a Gel: This is the simplest starting point. Place a single light source with a colored gel to one side of the subject. Experiment with different colors and angles. This creates a dramatic, color-washed effect.
* Two Lights with Complementary Colors: Use two lights, each with a different colored gel. Place them on opposite sides of the subject. Complementary colors (e.g., red and cyan, blue and yellow) often create striking results. Experiment to see what looks best.
* Background Color Wash: Aim a light with a gel at the background to create a colored backdrop. Use a second, unmodified light (or another light with a different gel) to light the subject.
* Rim Lighting: Use a gelled light behind the subject to create a colorful rim light that outlines their shape. This works well with darker backgrounds.
* Gel on Background, Subject in Shadow: Place a colored gel on a background light and keep the subject in silhouette. This creates a graphic, dramatic effect.
* Selective Coloring: Use a snoot or grid on your gelled light to create a focused beam of color, highlighting a specific part of the subject (e.g., their eyes, hair, or clothing).
* Color Gels for Mood: Consider the psychological effect of different colors:
* Red: Passion, energy, danger.
* Blue: Calmness, serenity, sadness.
* Green: Nature, growth, envy.
* Yellow: Happiness, energy, optimism.
* Purple: Royalty, mystery, creativity.
* Split Lighting with Gels: Use a hard light source (no modifier) with a gel on one side of the face, creating a sharp line of shadow down the middle. The gel color will illuminate one half of the face.
* Combining Gels: Place two gels together for interesting blends and new colors.
* Hair Light Gels: Use a hair light with a subtle gel color to add a highlight to the hair. Gold or amber gels often look great.
4. Camera Settings
* Manual Mode: Essential for controlling all aspects of your exposure.
* Aperture: Choose an aperture based on your desired depth of field. Wider apertures (e.g., f/2.8, f/4) will create a shallow depth of field, blurring the background. Narrower apertures (e.g., f/8, f/11) will keep more of the scene in focus.
* Shutter Speed: Typically, you'll use a shutter speed that's at or below your camera's flash sync speed (usually around 1/200th or 1/250th of a second).
* ISO: Keep the ISO as low as possible (typically ISO 100) to minimize noise.
* White Balance:
* Custom White Balance: Use a gray card to set a custom white balance for the light that's hitting your subject's skin. This will help to ensure accurate skin tones, even with colored gels in the scene.
* Tungsten White Balance: Can be used as a base, even with flash and gels, to get a starting point.
* Auto White Balance: Can often get confused by the strong colors of the gels.
* Metering: Use spot metering or center-weighted metering to get a more accurate reading of the light on your subject. You may need to manually adjust your exposure compensation to get the desired brightness.
* Shoot in RAW: Shooting in RAW gives you more flexibility to adjust the colors and exposure in post-processing.
5. Post-Processing
* Color Correction: Fine-tune the colors and exposure in post-processing software like Adobe Lightroom or Photoshop.
* White Balance Adjustment: If your white balance wasn't perfect, you can adjust it in post.
* Local Adjustments: Use adjustment brushes or gradients to selectively adjust the color and exposure of specific areas of the image.
* Dodge and Burn: Subtly lighten and darken areas of the image to add depth and dimension.
6. Tips for Success
* Experiment: Don't be afraid to try different colors, lighting setups, and camera settings. The key to success is experimentation.
* Start Simple: Begin with a single light and a single gel. As you gain confidence, you can add more lights and gels.
* Use a Light Meter: While not essential, a light meter can help you to accurately measure the light output of your flash and ensure consistent exposures.
* Consider Your Subject's Skin Tone: Some colors may look better on certain skin tones than others.
* Watch for Shadows: Colored gels can create strong, colorful shadows. Pay attention to where the shadows are falling and adjust your lighting accordingly.
* Use a Hair Tie on Gels: When you use a small flash, putting a hair tie on the gel where it meets the head will prevent the head from overheating.
* Practice, Practice, Practice: The more you practice, the better you'll become at using colored gels to create stunning portraits.
* Look for Inspiration: Find images online that you like and try to recreate the lighting and color palette.
* Safety: Be careful when using gels with hot lights, as they can melt or catch fire. Use heat-resistant gels and keep them away from the bulb. Always supervise your equipment.
* Communicate with your model: Ensure your model understands the creative direction and what you're trying to achieve. Their posing and expressions can contribute significantly to the final image.
Example Scenarios
* Cyberpunk Portrait: Use two lights: one with a vibrant cyan gel and the other with a magenta or pink gel, positioned on opposite sides of the subject.
* Film Noir Inspired: Use a single light with a deep blue gel to create a dramatic, moody atmosphere.
* Dreamy Portrait: Use a soft, diffused light with a light pink or lavender gel for a romantic, ethereal feel.
* Fiery Portrait: Use a red and orange gel on two lights to create a bold, passionate portrait.
By understanding the fundamentals of colored gels and experimenting with different techniques, you can unlock a world of creative possibilities and create truly unique and captivating portraits. Good luck!