Display : 

Retina HD display
5.5-inch (diagonal) widescreen LCD Multi-Touch display with IPS technology
1920-by-1080-pixel resolution at 401 ppi
1300:1 contrast ratio (typical)

Camera: 

Dual 12MP Wide and Telephoto cameras
Wide: ƒ/1.8 aperture
Telephoto: ƒ/2.8 aperture

Optical image stabilization
Six‑element lens
LED True Tone flash with Slow Sync
Panorama (up to 63MP)
Live Photos with stabilization
Wide color capture for photos and Live Photos
Auto HDR for photos
Auto image stabilization
Burst mode
Photo geotagging
Image formats captured: HEIF and JPEG

Video Recording : 

4K video recording at 24 fps, 30 fps, or 60 fps
1080p HD video recording at 30 fps or 60 fps
720p HD video recording at 30 fps
Optical image stabilization for video
2x optical zoom in; digital zoom up to 6x (iPhone 8 Plus only)
LED True Tone flash
Slo-mo video support for 1080p at 120 fps or 240 fps
Time‑lapse video with stabilization
Cinematic video stabilization (1080p and 720p)
Continuous autofocus video
Take 8MP still photos while recording 4K video
Playback zoom
Video formats recorded: HEVC and H.264

Face Time HD Camera:

7MP camera
ƒ/2.2 aperture
1080p HD video recording at 30 fps
Retina Flash
Wide color capture for photos and Live Photos
Auto HDR for photos
Auto image stabilization
Burst mode

Touch ID: Fingerprint sensor built into the Home button