Hi Martin,
habe auch zuerst mit dem Gedanken gespielt einen Spiegel selber zu schleifen.
Wollte aber beim ersten Eigenbau schnelle Erfolge sehen.
Selber schleifen eher beim nächsten mal.
So, hier der Text des Anbieters:
The primary mirror is the most important component of any reflecting telescope. Our primary mirrors are made by experienced opticians and are guaranteed to meet the theoretical limits of the resolution for their aperture. They are ideal for home-built Newtonian or Dobsonian telescope projects. Each mirror is precision ground and polished from Float glass blanks. The figure of each mirror is tested to ensure it meets the specification before proceeding to aluminization. Aluminum coated to a minimum 89% reflectivity and then over coated with transparent silicon monoxide for a durable, lasting finish. Mirrors upto 10-inch diameter comes in standard f/ratio as mentioned. Larger size mirrors are made to order with customized f/ratio and thickness.
Elliptical Flat Secondary Mirrors:
Precision polished and aluminized to a smooth, extremely flat surface. Over coated with silicon monoxide for a hard finish. Beveled edge. Size shown is minor axis.
Bei der Abnahme von 10 Stück 5 % Nachlass.
In dem Preis habe ich schon Zoll, Versand, etc eingerechnet.
An dem Preis lässt sich mit ein wenig geschickt bestimmt noch was machen <img src="/phpapps/ubbthreads/images/icons/cool.gif" alt="" />
Gruß,
Markus