Focus Won't Hold, Moving Subjects Blur? Lock It With AE/AF Lock

“Focus slips to the background the instant I press the shutter.” “It blurs when I get close.” This wandering steadies once you lock the focus — and you can do it with just your phone’s stock camera.

Why focus wanders

The camera re-reads focus and brightness every time the subject or framing changes. With a moving subject, or a scene with things both near and far, it can land somewhere other than where you meant. The idea is to lock it in advance and stop that wandering.

How to use it (iPhone / Android)

Press and hold the spot you want in focus. On iPhone the focus box glows yellow and an “AE/AF LOCK” banner appears (on Android, a lock icon or similar) — that means it’s locked. Frame your shot and press the shutter. While locked, focus and brightness hold even if the subject moves a bit or you pan the camera.

If you want to change only the brightness after locking, swipe up or down on the screen to adjust (→ Exposure compensation basics).

Scenes it suits

It helps with pets and kids running around, subjects behind a fence or glass, and moving in close over food from the front. When focus wanders in the dark of a night scene, locking onto a bright light source steadies it.

Start with just this

Press and hold to lock the spot you want in focus → frame and shoot → tap to release when done. That alone sharply cuts down on focus slipping and wandering.