Replying to Wide angle lens for canon hf s100

hey, i'm looking for a wide angle lens for my new cam. been looking alot at ebay but i'm afraid of buying a bad lens wich gets blurry i the edges of the video... so can someone recomend me a lens or show me whats legit. here's some of the lenses i have been looking at: http://cgi.ebay.com/WIDE-ANGLE-LENS-FOR-CANON-VIXIA-HF-S10-HF-S100_W0QQitemZ220485593955QQcmdZViewItemQQptZCamera_Lenses?hash=item3355f72b63 http://cgi.ebay.com/RAYNOX-WIDE-ANGLE-LENS-FOR-CANON-VIXIA-HF-S10-S100_W0QQitemZ360194507073QQcmdZViewItemQQptZCamcorder_Lenses?hash=item53dd440141 http://cgi.ebay.com/0-43X-Super-Wide-Angle-Lens-For-Canon-HF-S10-HF-S100_W0QQitemZ170388448746QQcmdZViewItemQQptZCamcorder_Lenses?hash=item27abf165ea plus the link to ebay where you can see all the lenses : http://shop.ebay.com/?_from=R40&_trksid=p3907.m38.l1313&_nkw=wide+angle+lens+canon+hf+s100&_sacat=See-All-Categories