1. Understanding the Technique:
* The Goal: To blur the background while keeping your subject relatively sharp with a burst of flash.
* Key Elements:
* Slow Shutter Speed: Allows ambient light to be recorded, creating motion blur.
* Flash: Freezes the subject, ensuring sharpness.
* Dark Environment: Necessary for the ambient light to be visible.
* Stability: Use a tripod or brace yourself well to minimize camera shake.
2. Gear You'll Need:
* Camera: DSLR or Mirrorless with manual mode control.
* External Flash: A speedlight or studio strobe. A flash with TTL capabilities can be helpful but manual flash control gives you the most precision.
* Tripod (Highly Recommended): Crucial for sharp results with slow shutter speeds, especially if you're not able to get a great bracing point.
* Remote Trigger (Optional but Helpful): Minimizes camera shake when pressing the shutter.
* Modifier (Optional): Softbox, umbrella, or reflector to shape and soften the flash.
* Neutral Density (ND) Filter (Optional): Allows you to use wider apertures or even slower shutter speeds in brighter environments.
3. Camera Settings (Starting Points):
* Mode: Manual Mode (M). This gives you full control over shutter speed and aperture.
* Shutter Speed: Start with 1/30th of a second. Adjust based on the amount of motion blur you desire. Slower speeds (1/15th, 1/8th, 1/4th) will create more blur. Experiment! Much faster than 1/30th, and you won't get much blur. Much slower than 1/4th, and you're likely to encounter camera shake problems.
* Aperture: Choose based on your desired depth of field. Larger apertures (f/2.8, f/4) will create a shallower depth of field, blurring the background more. Smaller apertures (f/8, f/11) will increase the depth of field, making more of the image sharp. Remember, in darker environments, wider apertures help gather more light.
* ISO: Keep the ISO as low as possible (ISO 100, ISO 200) to minimize noise. Increase only if necessary to brighten the image, but be mindful of image quality.
* White Balance: Set it appropriately for the ambient light (e.g., Tungsten for indoor lighting, Daylight for outdoors). You can also shoot in RAW and adjust the white balance in post-processing.
* Focus Mode: Single-point autofocus. Focus carefully on your subject's eyes. Switch to manual focus if you are having difficulty acquiring focus with AF.
4. Flash Settings:
* Flash Mode: Manual (M) for precise control. TTL (Through The Lens) can be used, but manual allows for more consistent results.
* Flash Power: Start low (e.g., 1/16th power) and increase as needed to properly illuminate your subject. The goal is to freeze the subject with the flash, so adjust flash power accordingly.
* Flash Placement: Experiment!
* On-Camera Flash: Convenient but can produce harsh shadows.
* Off-Camera Flash: Provides more flexibility in lighting your subject. Use a light stand and a wireless trigger. Angle the flash to create more interesting shadows and highlights.
* Flash Sync Mode: This is the most important setting for dragging the shutter. You have two options:
* Rear Curtain Sync (2nd Curtain Sync): The flash fires *at the end* of the exposure, just before the shutter closes. This results in the light trails appearing *behind* the subject, creating a more natural sense of motion. This is usually preferred.
* Front Curtain Sync (1st Curtain Sync): The flash fires *at the beginning* of the exposure, as soon as the shutter opens. Light trails will appear *in front* of the subject, which can look unnatural.
5. Shooting Technique:
* Composition: Think about the composition and how the motion blur will interact with your subject.
* Focus: Precisely focus on your subject's eyes (or the most important part of their face).
* Stability: Use a tripod! If you don't have one, brace yourself against a wall or other stable object.
* Shoot: Press the shutter button and hold the camera steady throughout the entire exposure.
* Review and Adjust: Check your images on the camera's LCD screen and adjust your settings as needed (shutter speed, aperture, flash power).
6. Post-Processing:
* RAW Editing: Shooting in RAW allows for greater flexibility in post-processing.
* Adjust Exposure and Contrast: Fine-tune the overall brightness and contrast of the image.
* White Balance Correction: If necessary, correct the white balance.
* Noise Reduction: Apply noise reduction if needed, especially if you used a higher ISO.
* Sharpening: Sharpen the image to enhance details.
Tips for Success:
* Practice: Experiment with different settings and flash positions to see what works best.
* Experiment with Motion: Have your subject move slightly during the exposure to create more interesting blur. Small movements are better than larger ones; aim for controlled shifts in position, not running or jumping.
* Use Colored Gels: Attach colored gels to your flash to add a pop of color to the scene.
* Incorporate Light Sources: Utilize existing light sources in the environment (streetlights, neon signs) to create more interesting trails.
* Communicate with Your Subject: Let your subject know what you're trying to achieve so they can cooperate and minimize movement during the exposure.
* Consider Your Background: Choose a background with interesting patterns or lights that will create appealing blur.
* Safety First: Be mindful of your surroundings, especially when shooting in busy areas.
* Use a wider lens if you don't have the option to back away.
* If the light is too bright for your chosen slow shutter speed, use an ND Filter. This helps reduce the overall light coming into the lens, allowing you to use a slower shutter speed or a wider aperture.
Example Scenario:
* Location: A dimly lit street with colorful storefronts.
* Subject: A person standing near a building.
* Camera: DSLR on a tripod.
* Lens: 50mm f/1.8
* Settings:
* Mode: Manual
* Shutter Speed: 1/15th second
* Aperture: f/2.8
* ISO: 200
* White Balance: Tungsten
* Flash Mode: Manual
* Flash Power: 1/8th
* Flash Placement: Off-camera, triggered wirelessly, angled slightly from the side.
* Flash Sync Mode: Rear Curtain Sync
By following these steps and experimenting with different settings, you can create stunning and creative portrait photos with the dragging the shutter technique. Remember, practice makes perfect, so don't be afraid to experiment and try new things!