I came up with an idea for a new lens to use on coins or paper money. I wanted to know if anything like this already exists or if it is even a good idea. It is an electric lens, sort of like a macro camera, that can zoom to about 12X or less and can plug into an Iphone to enlarge the image or take a picture. It is not an add on to an Iphone because it can be used without one. I also want to put a small magnet on it to test for fake silver coins. Please give some feedback or suggestions.