Standard on all Truss-Dobsonians 12.0" and larger. Roger had built the ‘scope to provide a home for a beautiful 12.5″ f/5 … For portability truss tubes become more necessary above 10" apertures (eg 16" 20" 24" etc) cos they can be disassembled to fit in a car. Truss Tube Dobsonian Telescopes: Truss tube telescopes make a great deal of sense for apertures of twelve inches or more. A lower mirror box housing the primary mirror is connected to the upper cage assembly with the secondary mirror and focuser using removable truss … This oustanding innovation allows the user to keep their scope assembled into two major sections, which allows for quicker assembly in the field as compared with other similar Truss-Dobsonian … Depending on design the larger mirrors would need a massive and heavy tube so truss tubes … You can just about get a 10" solid tube in most familly sized cars. Rebuilding a 12.5″ f/5 Truss Tube Dobsonian Some time ago my friend Bill Lofquist bought a dobsonian telescope from Roger Ceragioli. Range : $ - $ Dobsonian … Meade LightBridge Truss-Tube Dobsonian Deluxe Telescopes (3) Orion SkyQuest Classic Dobsonian (3) Orion SkyQuest IntelliScope (2) Orion XTg GoTo Dobsonian Telescopes (3) Sky-Watcher Dobsonian Series (8) Price.