|
Nic,
There is the Schmidt Cassegrain type of scope, made by Vixen, Meade and celestron. Also Takahashi. Largest sizes around 16" average size is 10"
There is the newtonian type of scope. It can come with an EQ mount and dobsonian. Dobsonian scopes can be as large as 40", most common though is the 12" and 10". With the EQ mount the size of a scope is limited by the mount size. With scopes of 16" and above the main expense is the mount. Mounts for scopes over 16" just are not very affordable.
There is the Mak/Newt or Mak/Cassegrain. Great scopes and can be found in sizes up to 13". Typically very expensive though.
There are a few other varieties, which cost in excess of 40K just for the scope. The mount is more still.
Anyway, hope that helps.
Paul
|