That brings us to an expensive new set of add-on lenses from Digital King and Japanese developer Toda Seiko, called “Wide & Macro” ($45) and “180 Degree Fish-Eye” ($89), which use a different mounting technique from their predecessors. Toda Seiko developed an adhesive and magnetic attachment system that sticks a magnetic ring to the back of your iPhone 3G or 3GS, enabling you to attach and detach each lens with only the…
