I got a C210 and using with my C2100uz.
Vignetting is quite bad imo, U'll really hv to use a little digital zoom to get pass the vignetting, or just crop it...
at full optical zoom, U can see the vignetting...
I posted some photos of this U can go to see them.
Click the 19x Optical to see the vignetting clearly http://www.pbase.com/galaa/uzizoom