Interferometry results on various mirrors from brand names...
You can draw your own conclusions:
http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&layout=1&eotf=1&u=http%3A%2F%2Fwww.astro-foren.de%2Fshowthread.php%3Ft%3D6084&sl=auto&tl=en
You can draw your own conclusions:
http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&layout=1&eotf=1&u=http%3A%2F%2Fwww.astro-foren.de%2Fshowthread.php%3Ft%3D6084&sl=auto&tl=en