The olloclip is a quick-connect lens solution for the iPhone 4 & 4S that includes Fisheye, Wide-angle and Macro lenses in one small, convenient package that easily fits in your pocket.
The Fisheye lens captures approximately a 180 Degree field-of-view and produces some striking images.
Japanese Car Parts?
The Wide-Angle lens is great for when you need that extra field of view, approximately double that of the normal IPhone.
The Macro lens applies roughly a 10X multiplier and allows you to focus the iPhone within 12-15mm