There are lots on ebay for very little money. Fisheye, wide angle and macro. But as for them being truly 'good'.... Thats a different matter. They are good enough for some different fun photos, but no good for professional use obviously.
One thing though, is that a lot attach via magnets on a sticky metal ring you place around the camera lens. I have one for my g2, and it needed to use 2 metal rings on top of each other as the magnet messed with the focus. With 2 rings, it is fine.
But, as the area around the lens is not perfectly flat, the rings on mine do not stay stuck and come off when removing the added lens. I'll try getting some pics of pics taken with it up.
Sent from my LG-D802 using Tapatalk