I have a 10 inch f10 Newt and with its 20mm secondary is bar none the best platetary scope I have ever looked through , a friend at the time's 152mm f12 AP super planetary APO could not compete at all , our clubs C14 had no chance as well .
The only down size was that the eyepiece was nearly 2.5 metres up , but a good solid set of steps fixed that , OH
it was definatly NOT portable ...
Brian.