There's an article by a Japanese site here http://dc.watch.impress.co.jp/cda/review/2004/12/27/634.html, about the the new M mount Planar. It was compared against Voightlander lenses on a Epson RD1 body. Fair comparison, since everything is manufactured by Cosina. http://www.cosina.co.jp/z.html Judge yourselves by the images on the site.