Basically, the iPhone 5c is the original iPhone 5's hardware in a plastic enclosure. The major upgrades in the iPhone 5s include the fingerprint sensor, a faster processor, a slightly upgraded camera, and not a ton else.
Honestly, I've been impressed with iPhone cameras ever since the iPhone 4. For example, every photograph in this collection was taken on an iPhone
, by a professional photojournalist who's been working for more than three decades in the field.
You're never going to get a world-class SLR camera on a mobile phone. But there's nothing wrong at all with the camera in the iPhone 5c.