Olloclip iPhone Camera Lens
The Olloclip iPhone Camera Lens will let you take some great pics and vids with your iPhone 4 and 4s. Slide on the lens and you can use three different lens types. Choose from either the wide-angle, fisheye, or macro lenses. The wide-angle will double your field-of-view. The fisheye will capture a field-of-view of nearly 180 degrees. The macro will allow you to focus within 12-15 mm of your subject while giving about a ten times multiplier.