A Gizmodo reader sent an e-mail to Apple’s support team that knew about the issue and the solution received from them was to “angle the camera away from the bright light source when taking pictures.”
Our engineering team just gave me this information and we recommend that you angle the camera away from the bright light source when taking pictures. The purple flare in the image provided is considered normal behavior for iPhone 5’s camera. If you wish to reach me regarding this case number *********, please contact me at 1-877-***-**** ext. *******. I currently work Thursday-Monday: 7:00am – 3:30pm Mountain Time. If you reach my voicemail, please leave your name, phone number, case number and the best time to reach you. Email is ***********@apple.com.
Some experts speculated that the problem may be caused by the Sapphire lens.