Dragging the shutter: mixing flash with ambient light
Combine a slow shutter speed with flash to keep warm room lights and atmosphere while freezing your subject. A key technique for events.
Flash alone at a dark reception gives bright faces and black backgrounds. Dragging the shutter means using a slower shutter speed so the camera also records the ambient light: string lights, candles, the glow of a venue.
How it works
The flash freezes your subject because its burst is extremely short. The slow shutter collects ambient light for the background. Together, you get a sharp, well-lit subject in a scene that still looks like the real room.
Settings to start
- Manual mode, ISO 1600 to 3200, f/2.8 to f/4
- Shutter speed 1/15 to 1/60, adjusted until the background looks right
- Flash in TTL, bounced or off-camera, to light the subject
Creative motion
At 1/8 or slower, moving the camera during the exposure creates light streaks and energy around a sharp subject, a classic look for dance floors.
Rear-curtain sync
Set the flash to fire at the end of the exposure. Motion trails then follow the subject naturally instead of appearing in front of them.
Color balance
Warm ambient light and neutral flash do not match. Add a CTO gel to the flash and set white balance to about 3200K for a cohesive look.
Next: Flash gels: matching room light and adding creative color
