[m11 (Mel)]

Originally Posted by Hans Tucker

They hold on to SDM's ... for good reason.

http://www.sdmtelescopes.com.au/

I think SDM uses Zambuto primary mirrors

Hey Hans,

You can pick pretty much any mirror you want with SDM (Pete).

Obviously Zambuto is the preferred choice for scopes 20inch and under and f/4 and above. You do pay alot more for f/4 as compared to f/4.5 which is his standard and quartz if you want it.