sometimes i see those convertors that allow wide angle and long tele for compacts, as well as various large accessories added onto a small compact camera.
i'm just curious. how good are they? how easy is it? does it make a point when it defeat the purpose of using a compact? shouldn't one just use a DSLR instead for those extended capabilities, and with a compact as a backup for purposes meant for compact without accessories?
what is your experience with these accessories? how much do you have to spend for them? do you find it worthwhile?