My camera is black or crashes when I open it. Is the lens broken?

Very unlikely. A black viewfinder with the interface still visible means the app is running but not receiving an image — almost always because another app still holds the camera, or a process is stuck. Force-quit the camera app, then any app that was recently using it (video calls are the usual culprit), and reopen. A genuinely dead camera module usually shows a black screen with no interface at all, or a System Status message in Settings.

Why are only some of my photos blurry?

Look at where the blur sits in the frame. If it is even across the whole image, think about the lens surface and the light. If the subject is soft while the edges are sharp — or the camera refuses to settle on anything — that is a focus problem, and the most common physical cause is a case or lens protector sitting over the camera. A genuinely dirty lens tends to smear highlights rather than blur the whole frame evenly.

Recording stops after a few minutes with a temperature warning. Is my phone faulty?

No — that is thermal protection, and it is the phone choosing to stop rather than let the sensor and battery get hotter. It is normal in long 4K recordings, in direct sun, while charging, or in a thick case. The fix is to change the conditions, not the phone: lower the recording resolution or frame rate, stop charging while recording, and take the case off.

iPhone Camera Won't Open, Photos Blurry, or Recording Stops: Which Problem Do You Have?

Short answer: these three complaints have three different causes, and only one of them is usually a real fault. A camera that will not open is almost always a software conflict. Soft photos are usually physical — the lens surface or something sitting in front of it. Recording that stops when the phone is warm is the phone protecting itself.

The camera will not open, or shows black

Work through this in order, and stop as soon as it works:

Force-quit the camera app and open it again. A stuck camera process is the single most common cause, and this clears it.
Force-quit whatever used the camera last. A video call that did not fully end — or any app that grabbed the camera and never released it — will keep the camera unavailable. This is the cause people miss most often, because the app is in the background and looks closed.
Restart the phone. This clears the camera subsystem itself. If a restart fixes it, the fault was software, not hardware.
Check for a System Status message. Settings → General → About reports hardware issues that iOS has detected. If there is a camera entry there, that is a real hardware fault and the phone needs service.

If the screen is black but you can still see the shutter button and the mode selector, the app is alive and simply has no image feed — that is the software case, and steps 1–3 fix it. If you see nothing but black with no interface at all, or the app closes instantly every time, take it in.

Photos come out blurry

Blur has a shape, and the shape tells you where to look.

Blur that is even across the whole frame. Almost always the lens surface. Skin oil smears light and softens everything, and a fingerprint on the lens is not always visible at a glance. Wipe it with a microfibre cloth — not a shirt, which adds lint and oil. A lens that is genuinely clean and the photos are still soft in good light points elsewhere.

A sharp background with a soft subject, or the camera hunting and never settling. That is focus, not cleanliness. The most common physical cause is something in front of the lens: a case with a raised lip, or a stick-on lens protector that is slightly off-centre or cloudy. Take the case off and shoot again — it takes ten seconds and settles the question.

Blur only in low light, or only on moving subjects. That is not a fault at all. In dim light the camera has to hold the shutter open longer, so any movement — yours or the subject's — shows up as blur. Holding still, bracing against something, or adding light fixes it. If your photos got noticeably worse after a system update, iOS 27 overheating after update covers how a phone still settling behaves, and iOS 27 camera overheating deals with the heat side specifically.

Recording stops, with the phone warm

This is the one people report as a fault and it is not one. When the phone gets hot, iOS stops recording and shows a temperature warning, because continuing would expose the sensor and battery to heat they are not designed to hold. The recording stopping is the protection working.

It happens most in these conditions:

4K at 60 fps — the most demanding mode, and the fastest to trigger it
Direct sun, or a car dashboard
Recording while charging — two heat sources at once
A thick case, which is a thermal blanket around the very component generating the heat

What actually helps, in order of effect: drop to 1080p or 30 fps, stop charging while you record, take the case off, and get out of direct sun. Heat is also why long recordings on a hot day fail when short ones on a cool day do not — it is cumulative, and the phone starts each session from whatever temperature it is already at.

If the phone is warm even when you are not recording, that is a different problem, and iOS 27 overheating after update is the place to start.

Only one app's camera is broken

If the Camera app works and a specific app's camera does not, the phone is fine and the app is the problem. Check these, in order:

Camera permission. Settings → [the app] → Camera. It is easy to deny this once and forget.
Another app holding the camera. Only one app can use the camera at a time. A video call running in the background will block every other app.
The app itself. Update it, or delete and reinstall. An app built against an older iOS release can fail in ways the system camera never does.

The general pattern is worth remembering: when the system camera works and a third-party one does not, stop troubleshooting the phone. See Apps and permissions for how iOS grants and revokes these.

When it is genuinely hardware

Take it in if any of these are true:

Settings → General → About shows a camera-related System Status message
The viewfinder is black with no interface at all, not even the shutter button
The app closes instantly, every time, including after a restart and a reinstall
Photos have a visible speck, spot, or scratch that does not move when you clean the lens

Everything else in this article is software, dirt, or heat — and none of those need a repair.