This case-adapter combo lets you mount your Canon EOS or Nikon SLR lenses to your iPhone 4 giving your phone powerful depth of field and manual focus. – Photojojo

“Android’s functional and aesthetic improvements are good for Apple and the mobile industry as a whole. As iOS users, you don’t have to like the directions Google is taking their platform, but you should respect that the innovations Google brings to phones and tablets will in some way shape the direction the the entire industry goes moving forward.”