Is there are definitive answer to which wide angle adapter is the sharpest on the Z1?
Raynox HD6600 ? Canon WD58 ? Sony VCL-HG0872 ? 16x9 Inc?
Most of these are on eBay bidding at tempting prices ...

Have you seen this thread? http://www.dvinfo.net/conf/sony-hvr-z1-hdr-fx1/77240-z1-wide-angle-recommendations.html