Manufacturer: -TS Teleskope
Product number: TSRC6M

EUR 555,00RRP EUR 639,00you save 13.1% (EUR 84,00)


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rating: 4.5 of 5
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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


0.67x CCD reducer for astrophotography
The CCD47 improves the focal ratio from f/8 to f/5.36, thus reducing the exposure time to less than 50%. With this, you can capture dim nebulae and galaxies with moderate exposure times.



Primary and secondary mirror of quartz glass with 99% reflectivity and protective dielectrical quarz layer:

Quartz glass does not change its dimensions if temperature changes. When the temperature changes slowly during an exposure, other mirror substrates, like Pyrex, tend to a deformation of the mirror and thus to a shift of the focus. This problem does not exist for mirrors of quartz glass. Thus the focus is better maintained which is very important for long exposures. Both mirrors are coated with 99% reflectivity. The image is obviously brighter than the one of telescopes with only 90% or 94% reflection layer.

The advantages of TS RC telescopes for astrophotography:

The TS RC astrographs are true Ritchey-Chrétien telescopes. Maksutovs and Schmidt-Cassegrains have spherical mirrors and need correctors for making a large field usable. With Schmidt-Cassegrains, you can see the aberrations in the field even when working visually. Most times, Maksutov-Cassegrains are so slow that they are not suitable for astrophotography. RC telescopes have hyperbolical primary and secondary mirrors. They are more difficult to manufacture, but offer a significantly sharper field with less aberrations throughout the field.

Why is the RC Telescope superior to Schmidt-Cassegrain telescopes with correctors:

Celestron EHD or Meade ACF telescopes need a corrector. Additionally, these telescopes have a Schmidt plate at the front side which is prone to dew. The RC is a pure reflection system without lenses in the light path. Thus you can use the complete light even in the infrared range. The image is brighter and the exposure times get shorter. The field of an RC telescope is coma-free by design and relatively flat.

No shifting problem with TS RC telescopes:

Telescopes with focusing via movable primary mirror often suffer from the shifting problem. The image shifts while focusing or even jumps. By now, Meade and Celestron have the problem under control, but the effect is noticable nonetheless. TS RC telescopes do not have this problem, as their primary mirror is fixed. Focusing is done via a high-quality focuser. An additional advantage is the optimal distance from primary to secondary mirror. This gives you the guarantee of the best possible image. If the primary mirror moves relatively to the secondary, you will practically never have the optimal distance.

Adjusting the RC telescope
We recommend the TSCOLLIT for adjusting the telescope. This is linked in the section "Adjustment and cleaning".

Manual
You can download a general manual for the TS-RC telescopes from the following link: Manual
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
6" f/9 RC Astrograph
2" Crayford focuser with 1.25" adaptor
Vixen style dovetail bar
M90 Extension rings 1x 50 mm and 2x 25 mm
Dust cover

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


Astrophotography with the TS 6" f/9 RC astrograph
click into the picture for a larger version.


Astrophotography with the TS 6" f/9 RC - Stefan Kienberger
Eexcerpts from the e-mail: ... the TS 6" is a fantastic small photo machine, especially with the CCDT67. .... I think that if I would have seen such photographs which have been made with this telescope before, it would have joined my other ones immediately. .... But I am very happy with it and can fully recommend it. Price/performance is already unbeatable.
Camera: EOS 450DA - ISO 800
Focal reducer: CCDT67 from Astro Physics
Exposure 5x 6min / 5x 2min / 5x 5min
Finder scope guiding with M-Gen autoguider





M81 M82 with the TS 6" f/9 RC Marcus Drath

Only telescope and camera were used, without other optical components.
Camera: unmodified Canon EOS 600D
Exposure: 18x5 min at ISO 800
Guiding: ASI120MM, guiding scope TSL50D, PHD
Mount: Advanced VX from Celestron





Experiences with the TSRED279 0.79x Photoline Reducer at the RC6
by Detlef Lind

After my return from Namibia, I have replaced the focuser of my RC6 by the TSFOCR25S and then tested the 2"-Photoline Reducer TSRed279, which was already in use at the TS Triplett Apo 80/480, at the RC6, together with the TS OAG 9.

The result with the EOS 60Da at 59 mm sensor distance has totally surprised me inasmuch as I had expected elongated stars in the corners, due to the fairly long distance of the sensor. However, a test series with M 278 as object at ISO 800 and 8 x 8 minutes exposure resulted in perfectly round stars over the entire image field - see photograph at left.

So, for persons interested in this telescope reducer combination, I specify the parts of my image train:

TSRed279 without the 10 mm extension (fill safety notch with aluminium tape !!!)
2 x T2Abstimmring1
Adapter TST2-M48s
TS OAG 9 with insert for M48 filter thread
EOS bayonet M48-EOSs with integrated neodymium filter


With this, I achieve the mentioned 59 mm sensor distance and set the RC6 to approximately 1115 mm focal length. Of course, instesd of inserting the filter into the camera mount adapter, one can use the TS OAG 9 in the standard configuration for EOS cameras and thread the filters in front of the reducer. That should change only little of the 81% reduction and the image quality.

Filling the safety notch prevents quite reliable the tilting of the image train if one pays attention to uniform contact of the edge of the reducer with the drawtube edge of the focuser.

I wish much success with reconstruction,

Detlef Lind



Testimonial and example image of our customers Florian Stürzer and Simon Stich aka galacticdudes
The two dedicated amateur astronomers from Grafing tried out the RC TSRC6M with the reducer CCD47, using a modified Canon EOS 60D. A test report is available as PDF here, we show a successful picture here:


Cone Nebula (NGC 2264)
Photographers: Florian Stürzer and Simon Stich
Telescope: TS 6" RC TSRC6M on mount Orion Atlas EQ-G
Imaging camera: Canon EOS 60D
Reducer: TS CCD47
Filters: RGB and Baader H-alpha 7 nm narrow band filter
Sensitivity: ISO 800/30° for RGB, ISO 1600/33° for H-alpha
Frames: 33x 600 s for RGB and 28x 600 s for H-alpha




Question:
Where are the extension sleeves located?

Answer from Teleskop-Service:
The telescope is supplied with 2x25 mm and 1x50 mm M90 extension sleeves. These are located at the bottom of the box. Simply open the box on the other side after removing the telescope and you will find the sleeves.


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Reviews

Written by Michael Geissel
on 2023-04-28

"Ich kannte den RC aus der Vergangeheit schon als 8"". Wie auch damals musste man den RC erst mal justieren, was aber in dem orginalen neu gekauften Zustand leider nicht zu 100% möglich ist. Denn den OAZ kann man nicht richten. Die Spiegel selber waren schon fast perfekt justiert beim aktuellen RC6, nur leider hatte der OAZ selber eine Abweichung auf die Mitte des Fangspiegels um knapp 3mm, welche nur mit dem Tiltadapterring korrigiert werden kann. Welcher dann nochmal ***? auf den Preis draufpackt und wer es eben noch nicht haben sollte ein Hilfsmittel für die Justage, Cheshire oder was ich empfehlen würde den Kollimator Ocal pro, welcher sich gut dafür eignet. Der RC6 verdient eigentlich 5 Sterne, ein Top Gerät, ich vergebe nur 4, da das Set nicht komplett ist. Wer sich einen RC zulegen möchte sollte am Ende vom doppelten Preis ausgehen bist man das Gerät zu 100% für die Astrofotografie einsetzen kann. vg *****"

Written by David Franke
on 2023-04-25

"teleskop sehr gut verarbeitet aktuell keinen test wegen schlecht Wetter mgl. macht aber einen guten Eindruck material spiegel und halterung 10/10 Pkt.Super produkt das Wiesel:-)"

Written by Palle Bohnholdt
on 2022-09-27

"Super RC til prisen"

Written by Oliver Leger
on 2019-10-31

"Sehr gutes Teleskop, empfehlenswert"

Written by Benjamin Rinna
on 2016-11-10

"Alles Ok!"

Written by Ian Whiteley
on 2015-12-02

"A compact telescope tube that mates well with my camera."