TS-Optics GSO 6" Ritchey-Chretien Pro RC Telescope 154/1370 mm OTA

TS-Optics GSO 6" f/9 RC Ritchey-Chrétien Telescope

Most large professional telescope are constructed according to the RC principle. Until recently, these telescopes were unaffordable for amateurs. RC telescopes from Teleskop Service are primarily aimed to amateur astronomers with photographic interest.

These telescopes are perfectly suited for high-resolution astrophotography. Of course, an RC can also be used for visual observing. Here, the large corrected field of view is noticeable, too. In total, the stars are sharper than, for example, in a Schmidt-Cassegrain.
 

How to reach focus on the 6" RC

Reaching focus is not a problem on the RC. Without extension sleeves, the back focus from the 2" connection is about 159mm. But included are three M90 extension sleeves (1x 50mm 2x 25mm) which are simply screwed between the focuser and the tube. This allows you to focus any accessory, starting from 1.25" and 2" zenith mirrors but also various correctors and all common cameras.
 

The advantages of the TS-Optics RC Telescopes at a glance:

♦ Hyperbolic primary and secondary mirror for a large fully illuminated field of view.
♦ Astrophotography with camera sensors up to 30 mm diameter possible without corrector. For larger sensors, like full-frame size, Teleskop-Service offers ready-to-use corrector solutions.
♦ 99% dielectric high-reflectivity coating on main and secondary mirror for an even brighter image.
♦ Significantly shorter cooling down time through open construction and active primary mirror ventilation.
♦ Internal baffles in the tube for even more contrast.
♦ High back focus for correctors, reducers and also binoviewers.
♦ High-quality 2" Crayford focuser for 2" and 1.25" accessories with compression ring
♦ Due to a redesign of the baffle tube, problems with stray light no longer occur. Nevertheless, the illumination is still very good. Sensors up to full frame format can be used.

 

Astrophotography with the TS-Optics 8" RC telescope:

Better and sharper astrophotos without corrector with shorter exposure times. This is exactly what this RC telescope allows you to do with astro cameras and SLRs up to APS-C sensors. As a pure mirror system, you can even use the infrared light. You can achieve up to 25% shorter exposure times and sharper imaging than, for example, through a comparable Schmidt-Cassegrain telescope. For the use of a reflex camera without focal length reduction you need the 50mm and the 25mm extension between focuser and telescope.

The generous backfocus also allows the connection of correctors, which we recommend from the use of full-frame sensors. You can also connect a focal length reducer, thus further increasing the light intensity of the RC.
 

Astrophotographic results obtained with this telescope on Astrobin

The RC telescopes are very well suited for astrophotography. Here you can find some astrophotographs made with this telescope model: Link to Astrobin


Technical data:
 

Optical Design:	True RC with a hyperbolic primary and secondary mirror.
Aperture:	6" / 154 mm
Focal Length:	1370 mm
Focal Ratio:	f/9
Resolution:	0.76"
Reflectivity:	99% reflectivity non-tarnishing dielectric mirror coatings
Back Focus:	159 mm from 2" connection of the focuser
Tube Diameter:	191 mm
Tube Length:	500 mm with focuser
Tube Weight:	5.4 kg
Obstruction by secondary:	77 mm
Focuser:	2" dual speed Crayford focuser
Connecting Thread:	M90x1
Dovetail Bar:	1x GP style