Apple:

Apple has determined that, in a small percentage of iPhone 6 Plus devices, the iSight camera has a component that may fail causing your photos to look blurry. The affected units fall into a limited serial number range and were sold primarily between September 2014 and January 2015.

If your iPhone 6 Plus is producing blurry photos and falls into the eligible serial number range, Apple will replace your device’s iSight camera, free of charge.

If you have an iPhone 6 Plus, it doesn’t hurt to enter you serial number to check to make sure your iPhone isn’t on the list of affected phones. If it isn’t and you’re still taking blurry photos, you might want to take a photography class.