A dirty camera lens is the most obvious culprit for blurry photos on a phone. Not only can dirt smeared on the lens cause blur or distortion directly, but it can also interfere with the autofocus feature of your phone. Use a clean microfiber cloth for camera lenses or eyeglasses to wipe your lenses.
So if you want your camera to operate at peak performance, as soon as a manufacturer releases an update, you should install it. Firmware updates aren't required. Some cameras never have updates. And others only gain minor updates or fixes, potentially offering solutions to problems that don't interest you.
If your iPhone camera is blurry, be sure to clean the lenses with a clean and dry microfiber cloth. You should also try restarting the Camera app and the phone itself. Don't pinch to zoom when composing your photos, as this can lead to blurry photos as well.
If the lens / glass in front of the camera has got micro scratches or microscopic amounts of dust has entered your phone , yes...it will get worse over time. Try clearing the Camera App info Cache and App info Storage as well. Also Clear the OnePlus Camera Service App info Cache and App info Storage as well.
Tip: Clearing the cache simply clears temporary files. It won't erase login credentials, downloaded files, or custom settings.
Clearing your cache on Android can free up valuable space and resolve issues with your phone's battery, speed, and security. Old cached data can corrupt, causing larger performance problems. If a particular app receives an update, the cached data from a previous version can cause conflict.
Clearing your Android app cache can help fix speed issues and free up storage space. If you need more storage, clear the cache of the apps that take up the most space. Clearing your app cache every few months will help streamline your phone and keep it from getting too full.
The most common reason for a blurry photo is an incorrect use of shutter speed. The faster your shutter speed is, the less chance there is for camera shake. This is particularly true when shooting handheld. There is no way that anyone will be able to handhold a camera steady enough at slow shutter speeds.
Dust or fingerprints on the camera lens make the image blurry. Taking photos in low light or darkness may result in blurred results. Your camera is in portrait mode. Moisture or some dust in the camera lens.
Your Camera Lens Is Dirty
Simply a small smudge on your lens could throw off your camera's autofocus, which would make your photos blurry. To clean your lens, use a microfiber cloth. Do not try wiping off your lens with your fingers. The oils on your hand will just make your lense blurrier.