1. Gear You'll Need:
* Camera: A DSLR or Mirrorless camera with manual mode controls (aperture, ISO, shutter speed).
* Lens: A portrait lens (50mm, 85mm, or longer) is ideal for flattering perspective and creating bokeh (blurred background). But a wider lens can work in some situations.
* Flash (Speedlight/Strobe): An external flash unit is a must. It should ideally have manual power control (so you can adjust the brightness). TTL (Through-The-Lens) metering can be useful, but learning manual control will give you more creative control.
* Light Stand (Optional but Recommended): This allows you to position your flash anywhere. Essential for getting the light off-camera.
* Flash Trigger (Optional but Highly Recommended): This wirelessly connects your camera to the flash, allowing the flash to fire when you press the shutter button. Radio triggers are the most reliable.
* Light Modifier (Crucial): This shapes and softens the light. Common options include:
* Umbrella (Shoot-Through or Reflective): Affordable and creates broad, soft light.
* Softbox: Provides more controlled, softer light than an umbrella. Come in various sizes and shapes.
* Beauty Dish: Creates a more specular (slightly harder) light with a distinctive shadow pattern. Good for dramatic portraits.
* Bare Bulb: Raw flash light will create harsh shadows. Avoid this (unless it's your intention).
* Reflector (Optional but Helpful): Bounces light back into the shadows on your subject, filling them in and creating a more balanced look.
* Background: A plain wall, a textured surface, or a scenic location. Consider color and how it complements your subject.
* Subject: Someone willing to pose for you!
2. Understanding Light:
* Inverse Square Law: The intensity of light decreases dramatically as the distance from the light source increases. Move the light closer to your subject for a brighter result, further away for dimmer.
* Hard vs. Soft Light:
* Hard Light: Direct, unmodified flash creates harsh shadows with well-defined edges. Good for dramatic looks.
* Soft Light: Created by bouncing or diffusing the flash, resulting in softer shadows with gradual transitions. More flattering for most portraits. Light modifiers are key.
* Direction of Light: Where the light comes from significantly impacts the look of your portrait. Consider:
* Front Lighting: Light directly in front of the subject. Can be a bit flat, but good for even illumination.
* Side Lighting: Light coming from the side of the subject. Creates shadows and dimension. Can be very dramatic.
* Back Lighting: Light behind the subject. Creates a silhouette or rim light effect.
* Top Lighting: Light from above. Can create unflattering shadows under the eyes and nose.
* Short Lighting: Lighting the side of the face that is turned *away* from the camera. Makes the face appear slimmer.
* Broad Lighting: Lighting the side of the face that is turned *towards* the camera. Makes the face appear wider.
3. Setting Up Your Shot (Key Steps):
* Ambient Light Control: Your goal is to minimize the impact of existing ambient light. Set your camera to manual mode and use settings to darken the background. A common starting point:
* Aperture: f/2.8 - f/5.6 (Lower for shallower depth of field, higher for more in focus)
* ISO: 100-400 (Keep it as low as possible to minimize noise)
* Shutter Speed: Experiment around the flash sync speed of your camera (usually around 1/200th or 1/250th of a second). Adjust this to darken or brighten the background. *The shutter speed primarily controls the ambient light*.
* Flash Placement (Starting Points):
* 45-Degree Angle: Place the flash to the side of and slightly in front of your subject at a 45-degree angle. This is a versatile starting point.
* Feathering the Light: Angle the light modifier *away* from the subject slightly. This puts the brightest part of the light *just* off your subject, creating a softer, more flattering effect. This is especially helpful with softboxes.
* High and Angled Down: Position the light stand slightly above the subject and angle the light down. This can create a nice shadow under the nose.
* Flash Power: Start with a low flash power setting (e.g., 1/16 or 1/32) and take a test shot. Increase the power until your subject is properly exposed. The flash power is primarily what controls the exposure of your subject.
* Reflector (if using): Position the reflector opposite the flash to bounce light back into the shadows. You can have someone hold it, or use a reflector stand. Experiment with the angle and distance of the reflector to see how it affects the shadows.
4. Key Techniques and Tips:
* Start Simple: Don't try to do too much at once. Master one lighting setup before moving on to more complex ones.
* Take Test Shots: Review your test shots carefully. Pay attention to the shadows, highlights, and overall exposure. Adjust flash power, flash position, and camera settings as needed.
* Feathering: As mentioned above, feathering the light is crucial for soft and flattering light.
* Distance Matters: The distance between the flash and your subject has a huge impact on the softness and intensity of the light. Moving the light closer will make it brighter and softer (relatively), moving it further away will make it dimmer and harder.
* Manual Mode is Your Friend: While TTL can be helpful in a pinch, manual mode gives you the most control over your lighting. Learn how to adjust aperture, ISO, shutter speed, and flash power independently.
* Pay Attention to Catchlights: Catchlights are the reflections of the light source in your subject's eyes. They add life and sparkle to a portrait. Pay attention to the size, shape, and position of the catchlights.
* Background Considerations:
* Separation: Ensure your subject is separated from the background. A blurred background (shallow depth of field) can help with this.
* Color Harmony: Choose a background color that complements your subject's skin tone and clothing.
* Posing: Good posing is just as important as good lighting. Study posing techniques for portraiture. Guide your subject to create flattering lines and shapes.
* Practice, Practice, Practice! The more you practice, the better you'll become at understanding and controlling light.
5. Common Lighting Setups with One Flash:
* Rembrandt Lighting: The flash is placed to the side of the subject at a 45-degree angle, creating a small triangle of light on the cheek furthest from the light.
* Butterfly Lighting: The flash is placed directly in front of and slightly above the subject, creating a butterfly-shaped shadow under the nose. Often used in beauty photography. Requires a good-looking subject, as it can accentuate imperfections.
* Side Lighting: Place the flash to the side of the subject to create strong shadows and dramatic effects.
* Backlighting (Rim Lighting): Position the flash behind the subject to create a halo of light around them. Often used for silhouettes or dramatic portraits. You'll usually want to overexpose slightly to get a good rim light effect.
6. Troubleshooting:
* Image Too Dark: Increase flash power, widen the aperture, or lower the shutter speed (be mindful of flash sync speed).
* Image Too Bright: Decrease flash power, narrow the aperture, or raise the shutter speed.
* Harsh Shadows: Use a larger light modifier, move the light closer to the subject, or use a reflector to fill in the shadows.
* Red Eye: Position the flash further away from the lens. Bouncing the flash can also help.
* Uneven Lighting: Check flash placement, feather the light, or use a reflector to balance the light.
7. Post-Processing:
* Even with great lighting, some post-processing can enhance your portraits. Adjust exposure, contrast, white balance, and skin tones as needed.
* Retouching can be used to remove blemishes or smooth skin, but use it sparingly to maintain a natural look.
By understanding the principles of light and practicing with your gear, you can create beautiful and compelling portraits with just one flash. Good luck and have fun!