Completely redesigned, the Explore Scientific 20" f/3.6 Truss Tube Gen 2 Dobsonian Telescope features improved stiffness and load-bearing capacity of the optical components to safely carry the large primary mirror and move the entire system smoothly without any vibration.
Its oversized parabolic primary mirror is highly reflective and corrects spherical aberration to eliminate distortion across the entire field of view, especially at the edges.
The low-weight rocker box provides a rock-steady observational platform with high mobility and very low vibration.
All connections of the tube structure are welded, with no rivets or screws.
Open aluminum truss design maintains performance while reducing weight, without sacrificing strength or stiffness
Silvered aluminum mirror coatings boost reflectivity to greater than 94% to maximize image brightness
Primary mirror and rocker box fans help to maintain mirror temperature to reduce distortion
Six supporting base feet improve stability to improve vibration suppression and smooth rotation
High altitude bearings enable a wide adjustment and travel range, with smooth movement and limited vibration
Tension control handle allows for smoother rotation to reduce vibrations and limit overcompensation
Primary mirror diameter
Mirror cell support points
Truss pole length
Truss pole diameter
Secondary cage assembly diameter
Secondary cage assembly weight
Secondary cage assembly height
Mirror box/rocker box height
Mirror box weight
Height to center of eyepiece at zenith
Theoretical limiting stellar magnitude
Theoretical Rayleigh limit
Theoretical limiting magnitude
Theoretical maximum magnification
Note: Mirror weight can vary because of the manufacturing process; these values are approximate