The TS 20" f/8 Ritchey-Chrétien astrograph is a ultimate telescope for astrophotography. The scope is perfect for bigger observatories.
The GSO 20" f/8 Ritchey-Chrétien Truss Tube Astrograph is a true RC telescope and will give you spectacular photo results also with large format camera sensors.
The telescope is perfect for big observatories and will be carried from mounts 10Micron GM4000 Class.
Aperture 20" / 508 mm
Focal Length 4064 mm
Focal Ratio f/8
Carbon truss tube with 2 Losmandy level dovetail bars
99% dielectric high-reflectivy coating on main and secondary mirror for an even brighter image
Big corrected flat field without need for additional correctors
3" MONORAIL Focuser with better stability
Redesigned back plate, decoupling of the focuser from the telescope with seperate collimation.
NOTE : Images on the left side are from the 16" RC Astrograph. The features of the 20" are identical.
In The Box
20" f/8 RC Astrograph
3" Focuser with 1:10 Micro Transmission
Reduction to 2" and to 1.25"
2x Dovetails - Losmandy style