1. Understanding the Challenges and Goals
* Challenges:
* Harsh Shadows: Direct on-camera flash can create unflattering, harsh shadows.
* Flat Lighting: Can make the subject look two-dimensional and lack depth.
* Red Eye: A common issue with direct flash.
* Overpowering Flash: Subject looks unnaturally bright, while the background is dark.
* Goals:
* Even Illumination: Light the subject evenly and naturally.
* Soft Shadows: Create subtle, pleasing shadows that add depth.
* Balanced Exposure: Expose both the subject and the background appropriately.
* Avoid Red Eye: Minimize or eliminate red-eye.
2. Gear You'll Need
* Camera: A camera with manual mode (M) is essential.
* External Flash (Speedlight): A dedicated flash unit that mounts on your camera's hot shoe. Look for features like:
* Manual Mode: Allows you to control the flash power.
* TTL (Through-The-Lens) Metering: An automatic flash mode that tries to determine the correct flash power, but learning manual is generally preferable for control.
* Flash Zoom: Allows you to focus the beam of light.
* Swivel Head: Crucial for bouncing the flash.
* Flash Modifier (Optional but Highly Recommended):
* Diffuser (e.g., Softbox, Bounce Card, Dome Diffuser): Spreads the light, creating softer shadows and more flattering results.
* Reflector: Bounces ambient light back onto the subject, filling in shadows.
* Grids and Snoots: Control the direction and spread of the light (more advanced).
* Tripod (Highly Recommended): For stability, especially at slower shutter speeds.
* Remote Trigger (Optional): Allows you to fire the flash off-camera.
3. Basic Settings
* Camera Mode: Manual (M) This gives you complete control.
* ISO: Start with a low ISO (e.g., 100-400) to minimize noise. Increase only as needed.
* Aperture: Control the depth of field.
* Wider Aperture (e.g., f/2.8, f/4): Shallow depth of field, blurred background. Lets in more light.
* Narrower Aperture (e.g., f/8, f/11): Greater depth of field, sharper background. Requires more light (flash power).
* Shutter Speed: Controls the ambient light. This is where things get a little tricky. Important points:
* Synchronization Speed (Sync Speed): Your camera has a maximum shutter speed it can use with flash (typically 1/200s or 1/250s). Going faster than the sync speed will result in a dark band in your image. Check your camera manual for your sync speed.
* Setting the Shutter Speed: Start at your sync speed (e.g., 1/200s). Then, adjust it to control the brightness of the *background*. A slower shutter speed will let more ambient light into the background, making it brighter. A faster shutter speed will darken the background. Important: Shutter speed has little to no effect on the brightness of your subject *when using flash*. The flash duration is so fast that it overpowers the ambient light in the brief moment it fires.
* Flash Mode:
* Manual Mode (M): You manually set the flash power (e.g., 1/1, 1/2, 1/4, 1/8 power). This requires some experimentation but gives you the most control.
* TTL (Through-The-Lens) Mode (Automatic): The flash tries to meter the scene and automatically adjust the power. Can be useful as a starting point, but can be unreliable.
* Flash Power: Start with a low flash power (e.g., 1/8 or 1/16) and gradually increase it until your subject is properly illuminated.
4. Flash Techniques
* Bouncing the Flash: This is the *most important* technique for softening the light.
* Bounce off Ceilings: Aim the flash head upwards towards a ceiling (if it's low and light-colored). The ceiling becomes a large, soft light source. Avoid colored ceilings, as they will cast a color tint.
* Bounce off Walls: If there's no ceiling or it's too high, bounce the flash off a nearby wall.
* Use a Bounce Card: If you can't bounce off a ceiling or wall, attach a bounce card to your flash head (or buy a flash with an integrated one) to direct some of the light forward.
* Direct Flash with Diffusion: If bouncing isn't possible, use a diffuser on your flash. This will soften the light somewhat. Dome diffusers, softboxes for flash, and even a tissue over the flash head can help.
* Off-Camera Flash:
* Using a Remote Trigger: Position the flash off to the side of your subject for more dramatic lighting. You'll need a wireless trigger to fire the flash. A light stand is also highly recommended.
* Benefits: Creates more dimension, reduces red eye, and allows for more creative lighting.
* Fill Flash: Use a small amount of flash to fill in shadows, while still allowing the ambient light to be the primary light source. This is often done in situations where there is some existing light (streetlights, etc.). Set your flash to a very low power (e.g., 1/32 or 1/64).
* Rear Curtain Sync (Slow Sync): This fires the flash at the *end* of the exposure. It's often used for motion blur effects, but be careful, as it can look unnatural if not done well.
5. Shooting Steps
1. Set your Camera to Manual Mode.
2. Start with low ISO (100-400).
3. Choose an Aperture. Consider f/2.8-f/5.6 for portraits with a blurred background, or f/8-f/11 for more background detail.
4. Set your Shutter Speed to your sync speed (e.g., 1/200s or 1/250s).
5. Set Flash to Manual Mode. Start at low power (e.g., 1/16 or 1/32).
6. Focus on your Subject.
7. Take a Test Shot.
8. Analyze the Image:
* Subject Too Dark: Increase flash power.
* Subject Too Bright: Decrease flash power.
* Background Too Dark: Slow down the shutter speed (but never below your sync speed).
* Background Too Bright: Speed up the shutter speed (but never above your sync speed).
9. Adjust and Repeat. Keep adjusting your flash power, aperture, and shutter speed until you get the desired result.
10. Consider Composition: Framing, posing, and background elements are just as important as the technical aspects.
6. Tips and Tricks
* Pay Attention to Color Temperature: Flash has a color temperature of around 5500K (daylight). If you're shooting under tungsten lights (yellowish), your flash will look blue. Consider using a CTO (Color Temperature Orange) gel on your flash to match the ambient light.
* Watch Out for Red Eye: Bouncing the flash or using off-camera flash greatly reduces red eye. You can also use your camera's red-eye reduction feature (pre-flash) or edit it out in post-processing.
* Practice, Practice, Practice: Flash photography takes practice. Experiment with different settings and techniques to learn what works best for you.
* Use Histograms: Check your camera's histogram to ensure proper exposure.
* Focus Carefully: Shallow depth of field means accurate focus is critical. Use single-point autofocus and focus on the subject's eyes.
* Post-Processing: Use software like Adobe Lightroom or Photoshop to fine-tune your images. You can adjust exposure, contrast, white balance, and reduce noise.
* Communicate with Your Subject: Help them relax and give them direction for posing.
* Experiment with Different Angles: Moving the flash or the subject slightly can dramatically change the look of the portrait.
Example Scenario
Let's say you are taking a portrait of a friend outdoors at night with some streetlights nearby.
1. Set up: Place your friend in a good location, avoiding direct glare from any strong light source.
2. Camera: Set your camera to M mode. ISO 200, Aperture f/4, Shutter Speed 1/200s (assuming that's your sync speed).
3. Flash: Mount your flash and aim it upward to bounce off the (imaginary) ceiling. Set flash to M mode, 1/8 power.
4. Test Shot: Take a test shot.
5. Evaluate:
* Friend is too dark: Increase flash power to 1/4.
* Background too dark: Lower your shutter speed to 1/100s to allow the streetlights to be more prominent. (make sure the subject doesn't move during the longer exposure)
6. Adjust and Repeat: Continue adjusting until you are happy with the results.
By following these guidelines and experimenting with different techniques, you can take stunning night portraits with flash that showcase your creativity and skill. Good luck!