Lighting a portrait with one window

Most portrait problems are placement problems, not equipment problems. A single window, used deliberately, will outperform a three-light setup used carelessly — and it teaches you to actually see light instead of dialing it in.

Why one source works

Daylight from a window is large relative to the subject, which is what makes it soft. The bigger the source relative to the face, the more gradual the transition from highlight to shadow. That gradient is what reads as dimensional.

Two things control the result:

• Distance — closer means softer and faster falloff
• Angle — governs how much of the face sits in shadow

The light doesn't get better when you add more of it. It gets better when you move it.

Finding the position

Start with the subject facing the window, then rotate them away in small increments. Watch the shadow under the nose and the shape it makes on the cheek. Somewhere between 30° and 60° off-axis you'll find the point where the face gains depth without the shadow side going muddy.

Filling the shadows

A white bounce card opposite the window lifts the shadow side. How close you bring it sets the ratio:

There's no correct row. Match it to the subject.

What to avoid

1. Mixed colour temperature. Turn off the tungsten lamps — daylight plus household bulbs gives you shadows in two different colours and no clean fix in post.
2. Direct sun. Hard, contrasty, and it moves. Wait for cloud or diffuse it.
3. Shooting at window height. Slightly above eye level is usually more flattering.

A practical starting point

Subject:   1.5m from the window, rotated ~45°
Camera:    Just above eye level, shooting into the shadow side
Bounce:    White card, 1m opposite the window
Exposure:  Meter the highlight, let shadows fall

Shoot a frame. Move the subject fifteen centimetres. Shoot again. The difference between those two frames will teach you more than any lighting diagram.

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