Why Add a Second or Third Speedlite?
Add another Speedlite when one light can’t do every job the picture needs. A single well-placed light can shape a face beautifully, but it can’t also separate dark hair from a dark background, keep the shadow side under control and add depth behind your subject at the same time.
In multi-light work, each flash gets one job:
- Key light: the main light that creates shape and sets the exposure.
- Fill light: a weaker light, or a reflector, that controls how dark the shadows get.
- Rim or hair light: a light from behind that draws a bright edge around your subject.
- Background light: a light on the backdrop that controls its brightness and colour.
This guide assumes you can already run one Speedlite off-camera in manual mode. If not, start with setting up your first single-light rig, then come back.
One rule makes every setup on this page easier: build it one light at a time. Switch each Speedlite on alone, get it right, then add the next. When something goes wrong, you’ll know which light caused it.
Lighting Ratios Explained
A lighting ratio describes how much brighter the lit side of your subject is than the shadow side. It’s the single number that decides whether a portrait feels soft and open or dark and dramatic.
| Ratio | Difference between lit and shadow side | Look | Typical use |
| 2:1 | 1 stop | Soft, open, flattering | Corporate headshots, beauty, family portraits |
| 3:1 | About 1.5 stops | Shaped but still gentle | General portraits, most people |
| 4:1 | 2 stops | Defined, moody | Character portraits, editorial, fitness |
| 8:1 | 3 stops | High drama | Low-key portraits, film-noir looks |
To set a ratio, start with the key light alone and expose it correctly. Then add your fill and adjust it until the shadow side sits the right number of stops below the lit side. In manual mode, each full power step on the fill (1/8 to 1/16, for example) moves it one stop. Moving the fill light twice as far away does the same job as dropping it two stops.
Many flash systems let you put each Speedlite in a separate group, labelled A, B or C, and control each group’s power from the transmitter on your camera. Some also let you mix modes within one setup, such as a key in TTL and a background in manual. This is useful when the subject moves but the background shouldn’t change.
Two-Light Portrait: Key and Rim Light
A key and rim setup separates your subject from a dark background, which is the most common problem a single light can’t solve. The rim light adds a thin, bright edge along the hair, shoulder and jaw on the shadow side.
Lighting diagram brief (for the designer): overhead view. Subject in the centre. Key light in a softbox at 45 degrees camera left, 1 to 1.2 m from the subject. Rim light with a grid behind the subject on camera right, about 120 to 135 degrees from the camera, 1.5 to 2 m away. Black flag between the rim light and the lens.
- Key: a 60 to 90 cm softbox at 45 degrees to one side, slightly above eye level, 1 to 1.2 metres away. Start at 1/8 power.
- Rim: a bare Speedlite with a 20 or 30 degree grid, behind your subject on the opposite side to the key, roughly 120 to 135 degrees around from the camera. Set it at head height or a little above, 1.5 to 2 metres away, aimed at the edge of the head and shoulder. Start at the same power as the key.
- Camera: manual, ISO 100, f/5.6 to f/8, at your sync speed.
The rim should read as a clean bright line, not a blown-out patch. If it spreads across the cheek, move it further behind the subject. If it causes haze or flare, place a black flag between the rim light and the lens. A darker background makes the rim stand out more, so keep your subject at least 2 metres from the wall.
Three-Light Portrait: Key, Fill and Background
Adding a fill and a background light gives you full control of shadow depth and backdrop tone. It’s the classic three-point layout, with the background light standing in for a hair light.
Lighting diagram brief (for the designer): overhead view. Key softbox at 45 degrees camera left, 1 m from the subject. Fill (large umbrella) directly behind the camera, slightly above the lens, 2 to 3 m from the subject. Background light behind the subject, aimed at the wall, with a grid. Subject 2 m from the wall.
- Set the key in a softbox at 45 degrees, about 1 metre from your subject, and expose the lit side correctly.
- Add the fill in a large umbrella directly behind the camera and slightly above the lens. Because it sits near the camera’s line of sight, it lifts the shadows without adding a second set of shadows. Set it 1 to 2 stops below the key to land between 2:1 and 4:1.
- Add the background light behind your subject, hidden by their body, aimed at the wall with a grid. Raise its power for a bright halo, or lower it for a darker, graduated backdrop.
- Check each light alone, then all three together.
For beauty work, try clamshell lighting instead. Place the key directly in front of your subject and above, angled down at about 45 degrees, and a reflector or second Speedlite below the face, angled up, 1 to 2 stops weaker. The two lights open like a clamshell around the lens, giving smooth skin and bright catchlights.
Lighting Products With Two Speedlites
Products need even, controlled light and a clean background, and two Speedlites can deliver both. The approach is to light the product and the background separately, so each can be set to the brightness you want.
Lighting diagram brief (for the designer): side view. Product on a white sweep, 1 m in front of the curve. Softbox at 45 degrees above and to one side of the product, 0.5 to 1 m away. White card fill opposite. Second Speedlite behind the product, aimed at the sweep.
- Surface: a white paper sweep (a roll that curves from the table up into the wall, so there’s no visible horizon line) or white acrylic for a soft reflection.
- Key: a softbox, ideally a narrow strip softbox, at 45 degrees to one side and slightly above, 0.5 to 1 metre from the product. A white card on the opposite side fills the shadows.
- Background: a second Speedlite behind the product, aimed at the sweep. For a pure white background, set it 1 to 1.5 stops brighter than your product exposure. Go much brighter, and the light wraps around the product’s edges and eats into them.
- Camera: on a tripod, ISO 100, f/8 to f/11 for enough depth of field (the zone from front to back that looks sharp), at your sync speed.
Keep at least 1 metre between product and background so the background light doesn’t spill onto the product. To shape light and colour further, see our guide to shaping light with gels and modifiers.
Lighting Reflective Surfaces: Glass, Metal and Gloss
On reflective surfaces, you light the reflections, not the object. A shiny surface works like a curved mirror, showing whatever faces it. Light bounces off at the same angle it arrives (the angle of incidence equals the angle of reflection), so your job is to decide what the surface reflects.
The size of the source matters even more than usual. A bare Speedlite creates a tiny, harsh hotspot. A large softbox or a diffusion panel creates a long, smooth highlight that describes the object’s shape.
Glass: bright-field and dark-field
Glass has two classic setups, and they produce opposite looks.
- Bright-field: place a Speedlite behind a white diffusion panel, 0.5 to 1 metre behind the glass, so the glass sits in front of an evenly lit white background. Add black cards just out of frame on either side. The glass edges reflect the black cards and show up as crisp dark outlines against the white.
- Dark-field: place the glass in front of a black background, then put two strip softboxes behind it, one on each side, roughly 120 to 135 degrees from the camera. The edges of the glass catch the light and glow white against the black.
Metal and glossy products
Polished metal, watches, phones and glossy packaging reflect everything around them, including you and your camera. Surround them with soft light, using a light tent or a large diffusion scrim with Speedlites firing through it, then add definition back with black cards. Without some dark reflections, a shiny object looks flat and featureless.
To keep yourself out of the reflection, use a longer focal length and shoot from further back, or cut a hole in a large black card for your lens. A polarising filter can reduce reflections on glass and water, but it won’t remove them from bare metal.
Troubleshooting Multi-Light Setups
Most multi-light problems come from lights interfering with each other, so isolate them before you change anything.
- Spill onto the background or the wrong part of the subject: add a grid, move the light, or place a flag between the light and the area it shouldn’t reach.
- Haze or flare across the frame: a rim or background light is shining into your lens. Flag it, or use a lens hood.
- Exposure changes between frames: a Speedlite in TTL is recalculating. Switch it to manual unless your subject is moving.
- One flash fires late or not at all: high power settings need longer to recharge. Drop to a lower power and raise your ISO by one stop, or wait a couple of seconds between frames.
- Two flashes respond to the same adjustment: they’re in the same group. Give each one its own group letter.
- Colour shifts from frame to frame: set a fixed white balance, such as the flash preset or 5500 K, rather than auto.
Build These Setups in the Intermediate Speedlite Workshop
Every setup on this page is easier to learn with a tutor beside you, adjusting ratios and positions on the spot and explaining what each change did. That’s how the Intermediate Speedlite workshop at Sydney Photographic Workshops runs.
Over five hours in the Alexandria studio, you work through the same building blocks covered here. You set lighting ratios to shape shadow, contrast and mood, build setups with two or more off-camera Speedlites, apply three-point lighting, and mix TTL and manual flash in a single setup. You then put it into practice on a professional model and still-life subjects, covering portraits, products and backgrounds, with gels, gobos and modifiers on hand.
Groups are capped at eight, SPW lends Speedlites if you don’t have enough for a multi-light setup, and you’ll need to be confident in manual mode. If you’d rather build up to it, book our intermediate flash course together with Speedlite Essentials and save $50 on the pair.
Frequently Asked Questions
What is a 3:1 lighting ratio?
A 3:1 ratio means the lit side of your subject’s face is three times brighter than the shadow side, a difference of about 1.5 stops. It gives a portrait clear shape while keeping the shadows gentle.
Where should I put a rim light?
Place it behind your subject on the opposite side to the key light, roughly 120 to 135 degrees around from the camera, at head height or slightly above. Add a grid to keep it from spilling, and a flag if it causes flare.
How many Speedlites do I need for product photography?
Two is enough for most products: one in a softbox as the key light and one lighting the background. A white card can stand in for a third light as fill.
How do I get a pure white background with Speedlites?
Light the background with its own Speedlite, set 1 to 1.5 stops brighter than your subject or product, and keep at least 1 metre between the subject and the background. Overexposing it further can wrap light around the subject’s edges.
How do you photograph glass without ugly reflections?
Control what the glass reflects rather than trying to remove reflections. A bright-field setup puts a lit white panel behind the glass for dark outlines, while a dark-field setup uses a black background and two side lights behind the glass for glowing white edges.
Can I mix TTL and manual flash in one setup?
Yes, if your flash system supports groups. A common approach is a TTL key light on a moving subject and a manual background light that stays consistent from frame to frame.
