To open the Camera app
Tap Camera
on the Home screen.OR
Tap the Home Button
> the Apps icon 
> Camera .
NOTE
If you've set a Lock screen other than Swipe, drag the Camera icon
to the left to open the Camera. From the Swipe Lock screen, drag
the Camera icon upward.With the backlight off or from any Lock screen, press either of the Volume Keys
twice to open the Camera
(enable this shortcut in the Settings app).