I. Understanding the Basics
* What are Colored Gels? Thin sheets of transparent colored material (usually plastic) placed in front of a light source to change the color of the light it emits.
* Why Use Gels?
* Atmosphere and Mood: Colors evoke emotions. Red can feel passionate, blue can feel cold or melancholic, yellow can feel bright and energetic.
* Drama: Unusual or contrasting colors can create a dramatic and eye-catching look.
* Separation and Depth: Different colors can separate the subject from the background or emphasize certain features.
* Corrective Color: CTO (Color Temperature Orange) gels warm up cool light (like flash or daylight), while CTB (Color Temperature Blue) gels cool down warm light (like tungsten). Although this is for color correction, it can also be used creatively.
* Creative Flair: Gels unlock a limitless palette for your portraits.
* Types of Gels:
* Full CTO (Color Temperature Orange): Converts daylight-balanced light (5500K) to tungsten-balanced light (3200K).
* Half CTO: Converts daylight-balanced light to approximately 3800K.
* Quarter CTO: Converts daylight-balanced light to approximately 4600K.
* Full CTB (Color Temperature Blue): Converts tungsten-balanced light (3200K) to daylight-balanced light (5500K).
* Half CTB: Converts tungsten-balanced light to approximately 4350K.
* Neutral Density (ND) Gels: Reduces light intensity without changing color. Useful for balancing light sources.
* Colored Gels (Reds, Blues, Greens, Yellows, Magentas, etc.): Available in a wide range of hues and saturations. LEE and Rosco are popular brands with extensive swatch books.
* Diffusion Gels: Soften the light and reduce harsh shadows.
* Necessary Equipment:
* Colored Gels: Get a sampler pack to experiment.
* Light Source: Strobes, speedlights (flashes), LED panels, or even continuous lights (though gels will melt much quicker)
* Gel Holders/Grids: Attach gels to your lights. Barn doors, grids, and snoots can also be fitted with gel holders. Clips, tape, or DIY solutions can also work in a pinch.
* Light Stands: To position your lights.
* Light Meter (Optional): Helps you accurately measure and control the light output.
* Camera with Manual Mode: Essential for controlling exposure and white balance.
II. Setting Up Your Gelled Lights
1. Safety First: Use gels designed for the type of light you're using. Continuous hot lights can melt gels quickly. Strobe flashes are generally safer.
2. Attach the Gels: Securely attach the gels to your light source using appropriate holders, clips, or tape. Make sure the gel covers the entire front of the light.
3. Light Placement: This is crucial. Consider these common setups:
* Single Gelled Light: Simple to start with. Place the light to the side, behind, or above your subject.
* Two Gelled Lights:
* Complementary Colors: Use colors opposite each other on the color wheel (e.g., blue and yellow, red and green) for contrast.
* Analogous Colors: Use colors that are next to each other on the color wheel (e.g., blue and green, red and orange) for a harmonious look.
* One Light for Background, One for Subject: Separate the subject with a contrasting color on the background.
* Three or More Lights: More complex but allows for very intricate lighting schemes. Consider using a key light (white or slightly warm), a fill light (often a cooler color), and a rim light (a strong color).
4. Light Modifiers: Experiment with light modifiers like umbrellas, softboxes, grids, and snoots *in addition* to gels. A softbox will soften the gelled light, while a grid will focus it.
III. Camera Settings and Considerations
1. Shoot in RAW: This gives you the most flexibility in post-processing to adjust white balance and color.
2. Manual Mode: Essential for controlling exposure.
3. White Balance:
* Custom White Balance: The most accurate approach. Use a gray card or white balance target under your gelled lights and set a custom white balance in your camera.
* Preset White Balance: Try different presets (Daylight, Tungsten, Flash) and see which gives you the desired result.
* Auto White Balance (AWB): Less predictable, but can sometimes work. Be prepared to adjust in post-processing.
* *Deliberate Mis-Calibration:* Sometimes, setting an *incorrect* white balance is the creative choice to further enhance the color effect. For example, setting your white balance to tungsten when using a blue gel will make the blue appear even more intense.
4. Aperture: Control the depth of field. A wider aperture (smaller f-number) will create a shallow depth of field, blurring the background.
5. Shutter Speed: Control the ambient light. A faster shutter speed will darken the ambient light and emphasize the gelled light. A slower shutter speed will allow more ambient light to mix with the gelled light. If using flash, be mindful of your camera's sync speed.
6. ISO: Keep the ISO as low as possible to minimize noise.
7. Power Settings: Adjust the power of your lights to achieve the desired exposure. Use a light meter (if you have one) for accurate readings.
IV. Creative Techniques and Ideas
* Color Blocking: Use hard light with gels to create distinct blocks of color on your subject and background.
* Monochromatic Color Scheme: Use different shades and tints of a single color (e.g., various shades of blue).
* Split Lighting: Light one side of the subject with one color and the other side with another color.
* Rim Lighting: Place gelled lights behind the subject to create a colored outline.
* Background Washes: Use a gelled light to wash the background with color.
* Gobo Effects: Place a cutout (gobo) in front of a gelled light to project patterns onto the subject or background.
* Mixing Gels: Overlap gels to create new colors.
* Colored Smoke/Fog: Use colored gels to light smoke or fog for a dreamy or surreal effect.
* Underexposure/Overexposure: Experiment with underexposing or overexposing the image to create different moods. Underexposing often makes colors more saturated.
* Skin Tones: Be mindful of how gels affect skin tones. Some colors can make skin look unnatural. Consider using a subtle gel or combining gels with a neutral density gel to reduce the color intensity. You may need to use adjustment layers in post-processing to correct skin tones.
* Color Temperature Contrast: Combine warm and cool colors for visual impact.
* Color Grading in Post-Processing: Use software like Photoshop or Lightroom to fine-tune the colors and create a cohesive look.
V. Tips and Best Practices
* Start Simple: Begin with one or two lights and gradually add more as you become more comfortable.
* Experiment: Try different colors, light placements, and modifiers to see what works best.
* Practice: The more you practice, the better you'll become at using colored gels creatively.
* Use a Model Release: If you're shooting portraits of people, make sure you have a model release.
* Consider the Theme: Make sure the colors you choose complement the overall theme and mood of your portrait.
* Test Shots: Take plenty of test shots and adjust your settings as needed.
* Watch Tutorials: YouTube is a great resource for learning different gel lighting techniques.
* Look at Examples: Study the work of other photographers who use colored gels to get inspiration.
* Keep Your Gels Organized: Store your gels in a safe place to prevent them from getting damaged. Use a gel wallet or case.
* Don't Be Afraid to Break the Rules: The most important thing is to have fun and experiment!
VI. Post-Processing
* White Balance Correction: Refine the white balance.
* Color Correction: Adjust individual colors to achieve the desired look.
* Skin Tone Adjustments: Correct any unnatural skin tones caused by the gels.
* Dodging and Burning: Enhance the highlights and shadows to create more depth.
* Color Grading: Apply a final color grade to unify the image and create a specific mood.
* Sharpening: Sharpen the image to enhance details.
By understanding the principles of color and light, and by experimenting with different techniques, you can create stunning and unique portraits using colored gels. Have fun and let your creativity shine!