The Best iPhone Camera Tip Ever -- The iPhone doesn’t capture a photo until you release the shutter button. Instead of tapping the button to take a photo, press and hold the button as you frame your shot. On the iPhone 3GS, you can still tap the screen to set a focus area with the button held down. When you’re ready to take the picture, release the button. This technique minimizes camera movement because you don’t have to both press and release the button with your finger.