0.5 is gone
My 0.5x camera lens doesn’t work. It shows up for a split second on photo and video but switches back to 1x zoom. Not sure why this is. 1x, 2x and 3x work fine. It’s just 0.5x zoom.
iPhone 14 Pro Max
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Please try this
If the photo is blurry, clean the front and back camera lenses with a microfiber cloth. If you see dirt or debris inside the lens, damage to your iPhone near the camera, or if the camera lens appears to be misaligned or blocked, contact Apple Support to discuss service options.
If you see motion blur in low-light situations and you use a lens converter, metallic case, or a magnetic lens mount, try removing the accessory.
Restart your iPhone, iPad, or iPod touch.
Update your iPhone to the latest version of iOS.
Test the camera again by taking a photo. If your device has a front and rear camera, check if one or both aren't working. To switch cameras, tap the rotate button 
.
If the camera or flash still isn't working properly, contact Apple Support to discuss service options.