I. Understanding the Concepts
* Flash: A brief burst of light designed to illuminate a subject. Regular flash sync speed is usually limited to around 1/200th or 1/250th of a second. At these speeds, the entire sensor is exposed during the flash burst.
* High-Speed Sync (HSS) / Focal Plane Sync (FPS): A flash mode that allows you to use shutter speeds *faster* than your camera's standard sync speed. It works by firing a series of rapid, low-power flash pulses as the shutter curtain travels across the sensor. This allows you to use fast shutter speeds, which is crucial for a few reasons:
* Overpowering the Sun: Use fast shutter speeds to darken the ambient light, making your flash the dominant light source. This is vital for shooting portraits in bright sunlight.
* Wide Apertures for Shallow Depth of Field: Achieve beautiful background blur (bokeh) even in bright conditions. Without HSS, you'd likely need to stop down your aperture to reduce light, increasing the depth of field and making the background sharper.
II. Gear You'll Need
* Camera Body: A camera that supports HSS with your chosen flash system. Most modern DSLRs and mirrorless cameras do, but check your camera's manual.
* Speedlight/Flash: A speedlight or strobe that supports HSS. Many name-brand flashes (Canon Speedlite, Nikon Speedlight, Sony HVL, Godox, Profoto, etc.) have this feature.
* Flash Trigger/Transmitter (Optional but Highly Recommended): Allows you to control your flash off-camera. This gives you more flexibility with lighting angles and power settings. Make sure the trigger also supports HSS.
* Light Modifier (Recommended): Softboxes, umbrellas, beauty dishes, reflectors, etc. These shape and soften the flash light for more flattering results. A large softbox is a good starting point.
* Light Stand (if using off-camera flash): To hold your flash and modifier.
* Batteries: Ensure you have fresh batteries for both your flash and trigger. HSS drains batteries faster.
* Neutral Density (ND) Filter (Optional but Helpful): An ND filter reduces the amount of light entering the lens, allowing you to use even wider apertures in extremely bright conditions, even with HSS.
III. Settings and Steps
1. Set Camera to Manual Mode (M): This gives you full control over aperture, shutter speed, and ISO.
2. Set Your ISO: Start with the lowest ISO your camera offers (usually 100). Higher ISOs will introduce noise.
3. Set Your Aperture: Choose the aperture based on your desired depth of field. Wider apertures (e.g., f/1.4, f/2.8, f/4) will create shallower depth of field and blur the background. Remember, wider apertures let in more light, which is what HSS helps you control.
4. Enable HSS:
* On Your Camera: Some cameras have a dedicated setting in the menu (often under flash or external flash control).
* On Your Flash: Many flashes have an HSS button (often labeled HSS, FP, or a similar abbreviation).
* On Your Trigger: If using a trigger, make sure HSS is enabled in the trigger's settings. Consult your trigger's manual.
5. Position Your Subject:
* Sun Position: Consider the direction of the sun. You can use the sun as a backlight, a rim light, or even have it slightly to the side of your subject. If the sun is directly behind your subject, it will help to create a pleasing rim light, separating them from the background.
* Background: Look for a visually pleasing background that won't distract from your subject. Consider elements like color, texture, and depth.
6. Position Your Flash:
* Off-Camera (Preferred): Place the flash to the side of your subject (often at a 45-degree angle). This creates more dimension and shadows. Experiment with different angles to see what looks best.
* On-Camera (Less Ideal): While less flattering, on-camera flash can be useful in a pinch. Direct flash can look harsh.
7. Set Flash Power: This is crucial. Start with a low power setting (e.g., 1/32 or 1/64) and take a test shot. Gradually increase the flash power until you achieve the desired exposure on your subject.
8. Set Shutter Speed: This is where HSS comes in. Start with a shutter speed faster than your camera's sync speed (e.g., 1/500th, 1/1000th, or even faster). The faster the shutter speed, the more you'll block out the ambient light and the more your flash will dominate the scene.
9. Take a Test Shot: Analyze the image on your camera's LCD screen. Pay attention to:
* Subject Exposure: Is your subject properly lit? Adjust flash power accordingly.
* Background Exposure: Is the background too bright? Increase your shutter speed to darken it. Is it too dark? Decrease your shutter speed (but remember to stay above your sync speed if you want to keep the shallow depth of field).
* Shadows: Are the shadows harsh? Use a larger light modifier, move the flash closer, or add a reflector to bounce light back into the shadows.
* Color Cast: Flash can sometimes produce a slight color cast. Adjust your white balance if necessary (either in-camera or in post-processing).
10. Refine and Repeat: Adjust your flash power, shutter speed, aperture, and light position as needed until you achieve the desired look.
IV. Tips and Considerations
* Battery Life: HSS significantly reduces battery life. Carry extra batteries, especially on longer shoots.
* Flash Power: HSS reduces the effective power of your flash. You may need to use higher flash power settings to achieve the desired exposure, especially in bright sunlight.
* Recycle Time: HSS can increase the recycle time of your flash. Be patient or use a flash with a fast recycle time.
* Practice: Experiment with different settings and light modifiers to learn what works best for you. Practice in different lighting conditions.
* Post-Processing: Don't be afraid to tweak your images in post-processing (Lightroom, Photoshop, Capture One) to fine-tune the exposure, color, and contrast. Minor adjustments can make a big difference.
* Light Falloff: Be aware of light falloff. As you move the flash further away from your subject, the light will become weaker.
* Subject Movement: Fast shutter speeds can freeze motion, which is helpful if your subject is moving.
* TTL vs. Manual Flash:
* TTL (Through-the-Lens) Metering: The flash automatically adjusts its power based on the light reading. TTL can be helpful for beginners, but it's not always accurate.
* Manual Flash: You manually set the flash power. This gives you more control and consistency, but it requires more practice. Many pros prefer manual flash for portraiture.
* White Balance: Choose an appropriate white balance (e.g., daylight, flash) or set a custom white balance using a gray card for accurate colors.
* Communicate with Your Subject: Direct your subject to create natural poses and expressions. A relaxed and comfortable subject will result in better portraits.
Example Scenario: Shooting Outdoors in Midday Sun
1. Camera: DSLR/Mirrorless with HSS support.
2. Lens: 85mm f/1.8 (or similar portrait lens).
3. Flash: Speedlight with HSS.
4. Trigger: HSS-compatible trigger.
5. Modifier: Softbox (24x36 inch or larger).
6. Subject: Standing in direct sunlight.
7. Settings:
* ISO: 100
* Aperture: f/2.8 (for shallow depth of field)
* Shutter Speed: Start at 1/1000th second (adjust as needed)
* Flash Power: Start at 1/16 and increase until the subject is properly exposed.
8. Positioning:
* Sun: Behind the subject or slightly to the side (creating a rim light).
* Flash: 45 degrees to the side of the subject, with the softbox diffusing the light.
9. Adjust and Refine: Take test shots and adjust the shutter speed and flash power until you achieve the desired exposure and background darkness.
By mastering these techniques, you can create stunning portraits with beautiful backgrounds, even in challenging lighting situations. Remember to practice and experiment to find your own style and approach!