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. A lower mirror box housing the primary mirror is connected to the upper cage assembly with the secondary mirror and focuser using removable truss … Range : $ - $ Dobsonian … Roger had built the ‘scope to provide a home for a beautiful 12.5″ f/5 … You can just about get a 10" solid tube in most familly sized cars. Truss Tube Dobsonian Telescopes: Truss tube telescopes make a great deal of sense for apertures of twelve inches or more. Rebuilding a 12.5″ f/5 Truss Tube Dobsonian Some time ago my friend Bill Lofquist bought a dobsonian telescope from Roger Ceragioli. 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. Standard on all Truss-Dobsonians 12.0" and larger. 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 …