Does this give u the equivilent of a 10x optical zoom?

The Canon-specified tele adaptor is the 1.75x Tele-converter TC-DC58N. This, coupled with the 4x of the G6, will give you 4*1.75=7x. Pretty far, but not quite 10x. The G6 lens is 35mm-140mm equivalent, so with the TC you'd have 68.25mm-245mm. If, however, you also plan to use the wide-angle adapter WC-DC58N, with a conversion of 0.7x, your range would be 24.5mm-98mm. Therefore, having both the wide angle and teleconverter lenses in your bag will result in the mythical 10x range (24.5mm with wide angle, 245mm with tele). Realize, however, that the 245mm long end of the G6+adapter zoom still won't have the reach of most cameras advertised as 10x on the market, which usually top out around 380-400mm (they start with a much higher wide end, however).

As an aside, there are of course many other conversion lenses on the market that will work with the G6 as long as you have the proper adapter (standard is 58mm) but I'm not aware of any that would get you much more reach than the one I mentioned above, so I based my calculation around that.

You can get a better lens adapter than the canon at lensmateonline.com, they also have some very good pics with the TC DC58N...