We have introduced a few nice protective case with matching lenses. But if you want more functions and photo effects, maybe TurtleJacket iPhone 4 case will be more suitable for you.
TurtleJacket is a versatile protective case designed for both iPhone 4 and iPhone 4S. The iPhone 4S case is constructed of sold aluminum in order to protect your iPhone 4 or 4S from bumps and scratches. Most important, the iPhone 4 case features a unique design for those who like taking pictures with their iPhone 4. As we can see from the images, the protective case comes with an UV lens and a wide angle lens for your photography creativity, and the 37mm threading allows you to apply various matching iPhone lenses to your iPhone 4 or 4S including fisheye lens, telephoto zoom lens and more, moreover, using a suitable TurtleJacket DOF adapter, you even can apply your favorite Canon or Nikon DSLR camera lens to your iPhone. Apart from that, the iPhone 4S case also features 2 tripod mounts, and the custom cutouts allow you access to all the buttons and functions of your iPhone.
TurtleJacket iPhone 4 case is available in two colors including black and silver, each one is priced at $126 USD. If you’re interested, jump to Turtleback official site for more details.