Exposure On A Phone: Getting It Right By Hand

Phones expose for the scene, not the subject

A phone camera is built to make a balanced-looking image fast. That usually works, until the scene has a bright window or a dark stage. Then it protects the average and lets your subject suffer.

The good news is that every phone gives you a way to overrule it. It is built into the camera app, one tap away.

The tap and the slider

Tap where you want the camera to focus and meter. A small sun icon appears beside the focus box. Drag it up to brighten and down to darken. That is manual exposure in its simplest form.

Hold the tap and the exposure locks in place. Now you can move the phone and the brightness will not drift, which matters the moment you start panning.

The phone already knows how to expose an average scene. You are there for the scenes that are not average.

When to use a real app

Third party camera apps expose ISO and shutter separately, the same way a mirrorless body does. That control helps in low light, where the phone wants to raise ISO and smear the frame with noise reduction.

For casual footage the built in slider is enough. For anything you will grade, an app that lets you set shutter is worth the few dollars.

Locking color along with exposure

On many phones, locking exposure also holds white balance, which stops the whole scene from shifting color as you move. That is a quiet benefit most people never notice.

If the color drifts anyway, tap a neutral surface first, then lock. Gray pavement works better than a colored wall.

Key takeaways

• Tap to meter, drag the sun to adjust, hold to lock.
• Phones protect the average, so overrule them on contrasty scenes.
• Lock exposure before you pan to stop brightness drift.
• Use a manual app when you need shutter and ISO control.
• Lock on something neutral to keep color steady too.

Practice in a tricky spot

Stand in a doorway with a bright room behind you and shoot into the dark. Drag the sun up and watch the face come back. Then lock it and walk forward.

A few minutes of this and a phone stops being a point and shoot. It becomes a camera with settings you actually control.