tubes. Typically, Surrier truss type telescopes use round tubes. Roger had built the ‘scope to provide a home for a beautiful 12.5″ f/5 mirror he had made. 0.0 (0) 0 Orders. A Six-inch f/5 Telescope offers the greatest performance available in a small package, whether the objects of interest are star clusters, nebulae and galaxies, or the moon, sun, and planets. EXPLORE SCIENTIFIC GENERATION II 16inch DOB 406mm f/4.5 Truss Tube Dobsonian Telescope. US $3,999.00. The design solves the problem of truss flexing by supporting the primary objective mirror and the secondary mirror by two sets of opposing trusses before and after the declination pivot. The carbon-fibre tubes are stiff, light and especially thermally stable - another reason why there is no focus drift. The focuser on the Orion 10" f/8 Truss Tube Ritchey-Chrétien Astrograph is a masterpiece of rigidity and precision. Carbon-fibre truss-tube design OTA Most professional telescopes use a truss-tube design and this telescope enjoys exactly the same advantages. 0.0 (0) 0 Orders. Mechanically the scope had a few problems. Celestron C8-A XLT Narrow 8" Schmidt Cassegrain OTA Optical Tube Assembly CGE/CG5 Professional. Stainless steel ball and socket hardware connects the truss tubes to the telescope's three large CNC-machined aluminum support plates. US $2,999.99. Smaller telescopes tend to use tubes and larger telescopes trusses - we shall look at each in turn. Some time ago my friend Bill Lofquist bought a dobsonian telescope from Roger Ceragioli. I have an APO triplet of Roger’s that is a prized possession. US $1,406.17. Browse an extensive selection of astronomy equipment at Telescopes.net. The mirror is gorgeous, as is typical for Roger who is one of the best opticians I know. We are your source for astronomy telescopes, eyepieces, astroimaging cameras, and more! The tube or trusses of a telescope must perform the task of holding the optical components at the correct separation and at the correct relative alignment, regardless of the orientation of the telescope on the sky. QHY16200 APS-H MONO format astronomy CCD camera. For large Dobsonians this has worked well and suppliers make end fittings so the tubes can be attached to the rocker boxes and upper end tube, but for smaller telescopes there are no end clamps available that work at all well and the ones I found were expensive. Natural ventilation is better with a truss-tube design and prevents the system from developing its own microclimate. The design was created in 1935 by engineer Mark U. Serrurier when he was working on the Mount Palomar 200 in (5.1 m) Hale telescope. 0.0 (0) 0 Orders . Thus, I was motivated to use channel stock. A Serrurier truss is used in telescope tube assembly construction. Introducing the newly redesigned 6-Inch Truss Tube Telescope by Stargazer Steve! SVBONY 2'' SV20/SV48 Refractor Astronomy Professional Telescope …