Dimitri (
http://www.flyerman.org/ ) gave me a hint to some nice macro converter which fits for different cameras. It was this one:
http://www.raynox.co.jp/german/dcr/dcr150/dcr150indexgm.htm
He also had one from his friends which I could test. This is the result combining the Raynox DCR150 and a Canon Powershot SX1.
The coin itself is dirty but even more dirt you can see at the back. The comb pattern are the airholes from my working pc. It seems I have to suck the dust out. A detail I wouldn't have seen without this macro shot. This is really a different world to have a one-cent-coin in 10 MPix! You must look at it in full resolution. BTW, this also is an HDR...