Factron iPhone case is a pretty unique metallic jacket for your iPhone. Once your iPhone has been wrapped with the Factron case, you can also stick a lens at the back of where the camera is. By that you can also interchange a variety of lenses to suit different shootings that you want.
There are a number of lenses such as those close-up, fish eye, or wide-angle lenses, which you can purchase to stick to the Facton case, and their prices range from $15 to $55. This Factron case works for iPhone 3G only and is not compatible with iPhone 3GS.
The Factron case is made from Arospacing class Aluminium and leather, which shall be pretty and provide ultimate protection to your iPhone. Currently, it case is available on eBay. A set consists of the case and 5 lenses costs you a hefty $500.