The Payload water rocket / pop bottle rocket may be used to take aerial photographs. Before flying your expensive camera, make a wooden mockup camera the same size, shape and weight, and fly it several times to improve your technique. When you are confident of your ability, then fly your real camera at your own risk.
It’s best to use a small, light digital camera with a very fast shutter speed (1/2000 sec), a very wide angle lens, and a continuous burst mode that keeps taking photos during the entire flight (like a GoPro Hero cam). Press the shutter button to start the camera recording high resolution photos, then pump up and launch the rocket. After the camera lands, upload the useful photos to your computer.