- Items included
The Guan Sheng Optical (GSO) 6" f/9 Ritchey-Chrétien is an excellent telescope for deep sky astrophotography. This bundle includes the Prima Luce Lab SESTO SENSO 2, a highly accurate robotic focus motor with an incredible resolution of 0.7 microns per step.
GSO Ritchey-Chretien 152mm f/9 with SESTO SENSO 2and the following optional accessories: EAGLE with PLUS dovetail clamp and guide scope installed above the telescope, ECCO environmental module.
While Prima Luce Lab's Esatto upgrade kits are engineered to the exact specifications of the telescope. If the manufacturer changes the design of the tube or the manufacturing tolerances are too great, this is out of our control. As a result, this could put the focus point outside of the range of the Esatto. If this is the case, we have plenty of different extensions available and can design custom adapters if necessary.
The Guan Sheng Optical RC's are excellent astrographs with solid build quality and precisely-figured optical surfaces. The concave hyperbolic primary and convex secondary mirrors deliver excellent correction across the field. The low thermal expansion BK7 mirrors have a surface correction of 1/12th Lambda PV or better and have highly reflective dielectric coatings ensuring 95% reflectivity.
The telescope is made with a rigid steel tube and features computer-optimized baffles to eliminate stray light.
|Focal length||1370 mm|
|Linear obstruction||76 mm|
|Corrected field||32 mm|
|Backfocus distance||159 mm with standard focuser, 254 mm from rear cell|
|Tube outer diameter||191 mm|
|Tube length||500 mm without focuser|