Go to Settings-> then scroll down to Lockscreen-> then go to "Shortcuts" slide the indicator to the right to turn "ON", where it reads "Shortcuts" press down on the screen-> Press the circle with the + it will open an App drawer slide it down to select the camera, move the camera to where you want it. Also delete/change order any of the other applications that you want for the Lockscreen from here. When done save (if available or) just hit the Home button, turn off and look at the Lock screen. To enable from Lockscreen touch camera and slide straight up towards top of screen. Enjoy!