The iPhone 4 camera is equipped with various settings and options to help you capture optimal photos on the go. Adjust the camera settings on your iPhone to activate the rear-facing or front-facing camera. Change flash settings when lighting conditions call for it or choose to capture High Dynamic Range (HDR) photos. High Dynamic Range blends three different exposures into a single picture for better image quality. You can even adjust the iPhone’s zoom just as you would on a regular digital camera. Writer Bio