How to Lock Focus and Exposure on iPhone and Pixel
Phone cameras decide focus and brightness for you, and most of the time they decide well. The trouble starts when the scene changes while you are framing: a person walks through, a cloud passes, or the camera jumps to the bright window behind your subject. Locking focus and exposure tells the phone to stop guessing and keep what you chose.
The steps below follow Apple's and Google's own help pages as of October 2026. Menu names can change with software updates.
1. Focus and exposure in one sentence each
- Focus decides which part of the picture is sharp.
- Exposure decides how bright the picture is.
Apple's guide explains that before you take a photo, the iPhone camera "automatically sets the focus and exposure," and that face detection balances the exposure across many faces. Locking takes over from that automatic choice.
2. On iPhone: tap, slide, or lock
2.1. Move focus with a tap
- Open Camera.
- Tap the screen where you want the focus area to be.
The camera now focuses there and sets the brightness for that area.
2.2. Adjust brightness by sliding
Right after tapping, drag up or down next to the focus area to make the picture brighter or darker. This is the quickest fix when a face looks too dark against a bright sky.
2.3. Lock it with AE/AF Lock
To keep your focus and exposure for the next shots, touch and hold the focus area until you see AE/AF Lock. AE stands for auto exposure and AF for autofocus. Now the camera stops adjusting even if something moves through the frame. Tap the screen to unlock.
This is the tool to use when:
- you are waiting for a subject to step into a spot you have already focused on,
- you want several photos of the same scene to match in brightness, or
- the camera keeps switching focus between near and far objects.
2.4. Lock exposure for longer
Apple also offers a separate exposure control:
- Tap the Camera Controls button, or swipe up from the camera modes.
- Tap Exposure and drag the slider.
Apple says the exposure then stays locked until the next time you open Camera. To keep it even after closing the app, go to Settings > Camera > Preserve Settings and turn on Exposure Adjustment. Tap the reset button in the exposure control to go back to normal.
On models with the Camera Control button, Apple notes you can lightly double-press it, slide to the Exposure setting, lightly press to select it, and then slide to adjust.
2.5. Manual focus on newer Pro models
Apple's current guide adds that iPhone 18 Pro models have a Focus tool for setting focus at a specific distance with a slider, with in-focus areas outlined, and that they can track a moving subject: tap the subject, then double-tap the yellow frame to start tracking. The Focus tool is not available in every camera mode.
3. On Pixel: tap and lock
Google's Pixel Camera Help describes the steps for adjusting focus on a subject:
- Point the camera at your subject.
- Tap the subject. A white circle appears and moves on the screen with the subject.
- To lock the focus and exposure on a subject that moves, tap Lock.
Google adds that if you have accessibility features turned on, you double-tap the screen to focus on and expose the subject.
For simple shots, Google's getting-started guide is even shorter: point your camera, wait for it to focus and take in light, then tap the shutter.
3.1. Pro Controls on some models
As of October 2026, Google lists Pro Controls only for Pixel 8 Pro, Pixel 9 Pro, and Pixel 9 Pro XL. They add sliders at the bottom of the screen for focus, shutter speed, and ISO. These give fine control, but the tap-and-lock method above is enough for most everyday photos.
4. Situations where locking helps
| Situation | What goes wrong | What to do |
|---|---|---|
| Person in front of a bright window | Face turns dark | Tap the face, then slide brighter (iPhone) |
| Waiting for a runner to reach a spot | Camera refocuses on the background | Lock focus on the spot first |
| Several shots of a product or dish | Brightness changes between photos | Lock exposure so every shot matches |
| Close subject with a busy background | Focus keeps jumping | Lock focus on the subject |
| Moving pet on Pixel | Focus drifts off the subject | Tap the pet so the circle follows it, then tap Lock |
5. Common mistakes
- Tapping once and expecting a lock. On iPhone, a single tap only sets focus; touch and hold to lock it.
- Forgetting the lock is on. If later photos look oddly bright or blurry, tap the screen to release AE/AF Lock.
- Locking, then moving closer. If you change your distance to the subject, set focus again.
6. Key takeaways
- On iPhone, tap to choose the focus area, then drag up or down beside it to adjust brightness.
- Touch and hold the focus area until AE/AF Lock appears to keep focus and exposure fixed; tap to unlock.
- The Exposure control stays locked until you reopen Camera, or longer with Preserve Settings turned on.
- On Pixel, tap the subject to start the tracking circle, then tap Lock to hold focus and exposure.
- Locking is most useful for backlit faces, matched series of shots, and subjects about to move into place.