lens for powershot s1

[melyviz]

Hello,

I recently purchased my S1 camera and would like to use the possibility of the additional lens if possible.
What I'm looking for the most is macro/closeup lens (and at this point, can someone tell me what is the difference?) for <10 cm focal lenght.
And any suggestion about wide- and teleconverters? I already looked at Canon products but found them very expensive...
Adapter ring: it was said on Canon Official that I need to get the lah-dc10 adapter to attach additional lens or filters but will that apply for all makers & products or Canon only?

Thanks for helping me!