The cameras in your iPhone take great photos even in difficult conditions. If you accidentally move a camera when you take a picture, the resulting image can be blurry. To prevent this, some iPhone models have optical image stabilization (OIS).1 OIS lets you take sharp photos even if you accidentally move the camera. Additionally, some iPhone models have closed-loop autofocus (AF).2 Closed-loop AF resists the effects of gravity and vibration to preserve sharp focus in stills, videos, and panoramas.
With OIS, a gyroscope senses that the camera moved. To reduce image motion, and the resulting blur, the lens moves according to the angle of the gyroscope. With closed-loop AF, on-board accelerometers measure and compensate for gravity and vibration effects. Magnetic sensors determine the lens position so that the compensating motion can be set accurately.
- Optical image stabilization is available on iPhone XS, iPhone XS Max, iPhone XR, iPhone X, iPhone 8, iPhone 8 Plus, iPhone 7, iPhone 7 Plus, iPhone 6 Plus, and iPhone 6s Plus.
- Closed-loop AF is available on iPhone XS, iPhone XS Max, and iPhone XR.
A strong magnetic field can interfere with OIS and closed-loop AF
Lens-position sensors respond to magnetic fields. If you place a magnet near these sensors, the magnetic field will interfere with or temporarily disable the sensors. This can degrade the sensors' accuracy and limit the range of movement available to the lenses. The camera will continue to take photos with other means of stabilization but without the benefit of OIS and closed-loop AF.
How to avoid magnetic interference
Third-party manufacturers make some accessories with strong magnets or magnetizable metal plates that are near the iPhone rear camera (or cameras). These magnets and plates can latch folio covers, join separable cases, or attach to rigid mounts—for example, car mounts. Apple recommends that third-party manufacturers avoid using magnets and metal components in cases and other accessories. For best camera performance, avoid accessories that use magnets or magnetic metal.
If your camera still isn't working
If you removed your iPhone case and any other magnetic accessories and your iPhone camera still isn't working, find out what to do.