You can get to your device's camera app from the lock screen using the lock screen shortcut for camera. This allows you to take a picture without unlocking your device.
1.
From the Lock screen, drag the Camera icon toward the top of the screen.
2.
Tap the Shutter icon to take a picture.
3.
You've completed the steps!
1.
From the Lock screen, drag the Camera icon toward the top of the screen.