If the iPad is locked, there’s a shortcut to quickly open the Camera app straight away. Slide the camera icon in the bottom right corner up until the Camera app appears.
For added security, users aren’t able to look through camera roll items, or see past photo history if the passcode was enabled when the Camera app was opened via this method.
It’s also possible to open the Camera app from Control Center. Slide up from the bottom of the screen to open Control Center and tap the Camera icon.