While Apple has improved the iSight camera on the iPhone 5s, the number of megapixels remains the same as the iPhone 5 and 5c. The iPhone 5s image sensor is 15 percent larger than its predecessor, and the aperture is also larger.
The iPhone 5s camera is 8 megapixels, with 1.5µ size pixels. The main camera records 1080p HD video at 30 fps.
The front-facing FaceTime camera on the iPhone 5s is 1.2 megapixels and records 720p HD video.