Triband-SCT - Schmidt-Cassegrain-based Multi-Purpose-Telescope, for Sun and Deep Sky

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Triband-SCT - Schmidt-Cassegrain-based Multi-Purpose-Telescope, for Sun and Deep Sky

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€ 3,745.00 Price excl. German VAT tax (19%): € 3,147.06
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  • Triband-SCT's are available in apertures of 8", 9¼" and 11".
  • The telescope features:
    • Schmidt Cassegrain optical tube assembly with Triband-ERF-coated Schmidt corrector plate, rear ventilated heat shields for tube and secondary mirror (with Neodymium-magnetic holders)
    • The transmission windows are designed for Calcium-K, Continuum (incl H-beta and O III), H-alpha, S II
  • The Triband-coated Schmidt corrector plate reflects more than 90 percent of the incoming light, so that no additional ERF (energy rejection filter) is necessary
  • Highest resolution for solar observing at an affordable price
  • For the following uses, you need further equipment:
    • H-alpha: Solar Spectrum H-alpha filter, TZ-3 telecentric system and telecompressor TK0.4 or TK0.7. An additional D-ERF filter is not required. (T 630 - 680 nm)
    • CaK: Solar Spectrum CaK-filter, K-Line-filter plus additional frontfilter for observing the sun in CaK
    • Planetary Photography in UV: Baader U-filter (T 380 - 400 nm)
    • Deep-Sky (not for solar observations!):Deep-sky filters according to your field of interest (RGB / H-beta / O-III / H-alpha / S-II)

We recommend: APF-R image sharpening process

The APF-R method for sharper images was developed by Christoph Kaltseis over the last couple of years. It is based on a simple, but important question: How does a really sharp image look like? APF-R describes this step of image processing in a way.
www.baader-planetarium.com/de/blog/apf-r-absolute-point-of-focus/

Important note: This product is not available online. If you are interested, please send us a formal inquiry incl. contact data by email. We shall gladly provide a detailed offer.

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€ 3,745.00 Price excl. German VAT tax (19%): € 3,147.06

Product Questions

Can you use a Daystar Quark instead of the Solar Spectrum with the Tribune SCT?
-9
Question by: Robert Henry on Oct 29, 2017 3:27:00 PM | 1 Answer(s)
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Size matters – even for solar observing!

There are many small, nice telescopes available which are great for a quick look at the sun in H-alpha or CaK, but who wants to observe always only with a "finderscope"? To see faint details, you need aperture and focal length. The groundbreaking Baader Triband-SCTs have got the energy rejection filter (ERF) – which is necessary for the SolarSpectrum CaK and H-alpha filters – already integrated into the Schmidt corrector plate. Especially in IR, the Triband Schmidt corrector is blocked down to 1450nm, so that the telescope will not heat up. So, you do not need an additional large and precisely polished ERF, and you can use the full optical quality of the Schmidt corrector. Additional rear-ventilated heat shields in front of tube and secondary mirror also keep the tube from heating up by the sun's radiation. This way, you can use the full resolution which is available at your location. With videography it is possible to achieve extremely high-resolution detail images of the sun. And you can do this at three wavelengths – not only in H-alpha!

The system is also great for visual observations – the sun will impress you more than ever in those moments when the seeing is good. Please note that a Triband SCT is no grab-and-go-telescope: Smaller telescope with less magnification will show nice images even at poorer seeing conditions, but a high-end telescope which pushes everything to its limits also requires a proper location. Make sure that your surroundings don't cause bad local seeing – only then you can take the telescope to its limits! The Triband-SCTs are based on Celestron's Schmidt-Cassegrains, a well-tried and reliable no-frills telescope system.

Unlike pure H-alpha-telescopes, you can use the Triband-SCT even at night: The coating is permeable for CaK, H-Beta,O-III, H-alpha and S-II, so that you can use the telescope fully for narrowband- or Ultra UHC-photography – be it with the original f/10, at night with a reducer at f/7 or even with a Hyperstar-system at f/2. You can even use UV-filters (Baader U-Venus-filter) or IR-pass-filters and achieve a surprisingly good contrast. The SC optical system suffers much less from chromatic aberration over a much broader spectral range than the best apochromatic lens telescopes. This makes the Baader-Triband-Schmidt-Cassegrains the most versatile CaK and H-alpha-telescopes on the market.

Triband SCT – Multi-purpose telescopes for professional applications

The Triband-SCs with Triband-ERF-coated Schmidt-corrector were designed on the base of the time-tested Celestron Schmidt-Cassegrain (SC) telescopes. They are the perfect telescopes for both high-resolution H-alpha solar observations and narrowband deep-sky photography.

Size matters – even for solar observing!

Die Triband-Beschichtung ist ein Energieschutzfilter für die Sonnenbeobachtung, der die Deep-Sky-Tauglichkeit nicht beeinträchtigt. Hitzeschilde verhindern eine Aufheizung des Tubus.

The Triband-coating is an Energy Rejection Filter for observing the sun, whihc does not interfere with narrowband deep-sky observations. Heat shields avoid heating ob of the telescope.

It is a common misconception that small telescopes are sufficient for observing the sun as high magnifications can rarely be used at daytime

The nice little H-alpha and CaK telescopes which are quite common nowadays are great for a quick look at the sun and to see the complete solar disk; but if you want to see fine details, you need  aperture and focal length to make use of those moments when the seeing is perfect.

The groundbreaking Baader Triband-SCTs have got an Energy Rejection Filter (ERF) – which is necessary for the SolarSpectrum CaK and H-alpha filters – already integrated into the Schmidt corrector plate. You don't have to pay the additional costs for an Energy Rejection Filter (ERF), which would be "astronomical" for telescopes between 8 and 11 inch. With its Triband-coating, the telescope is still perfectly fitted for narrowband deep-sky-photography, although it was made for solar observing!

Especially in IR, the Triband Schmidt corrector is blocked down to 1450nm, so that the telescope will not heat up. So, you do not need an additional large and precisely polished ERF, and you can use the full optical quality of the Schmidt corrector.

Additional rear-ventilated heat shields in front of tube and secondary mirror also keep the tube from heating up by the sun's radiation. This way, you can use the full resolution which is available at your location. With videography it is possible to achieve extremely high-resolution detail images of the sun. And you can do this at three wavelengths – not only in H-alpha! You can observe the sun in H-alpha as well as in CaK with a SolarSpectrum Filter, or in in continuum (white light) with a Herscel wedge or an ASTF filter.

The system is also great for visual observations – the sun will impress you more than ever in those moments when the seeing is good.

Observing the sun in H-alpha

SolarSpectrum-Filter for H-alpha or CaK can be connected directly

The Triband-SC were developed for the SolarSpectrum H-alpha filters. The Energy Rejection Filter which is integrated into the Schmidt corrector plate eliminates the need for an additional D-ERF. The SolarSpectrum filters require the  2" Research Grade TZ-3 Telecentric System (3x focal length) (#2459257, € 395,-) , to perform at its best at f/30; with the SolarSpectrum Research Grade 0.4x Telecompressor 2" (#2459260, € 325,-) with 16mm corrected field of view, you almost regain the original focal length of the telescope and can work both visually and photographically at lower magnifications.

Observing the sun in CaK

In addition to the transmission window between 630 and 680 nm for H-alpha observation, the Energy Rejection Filter has a second window between 380 and 400 nm, in the dark blue/UV. It is made for using SolarSpectrum CaK filters without an additional Energy Rejection Filter.

In addition, the  Baader K-Line Filter 1¼" (double stacked) (#2458355, € 295,-)  filter can be used, but only behind another filter such as a Herschel wedge or AstroSolar photo film ND 3.8 (also available as BDSF in matching mount).

Observing the sun in continuum (white light)

Mit einem Herschelkeil oder einem ASTF-Frontfilter ist die Weißlichtbeobachtung mit großer Öffnung und Auflösung möglich

Use a Herschel Wedge or an ASTF front filter to see the sun in white light with large apertures and high resolution.

Solar observation in white light can be done with a Herschel wedge or a temperature-compensating ASTF front filter made of astrosolar film. The sun appears slightly light green. For increased contrast, we recommend a red filter to reduce the influence of seeing.

A note about solar observing

Please note that a Triband SCT is no grab-and-go-telescope: Smaller telescope with less magnification will show nice images even at poorer seeing conditions, but a high-end telescope which pushes everything to its limits also requires a proper location. Make sure that your surroundings don't cause bad local seeing – only then you can take the telescope to its limits!

Deep-Sky narrowband observation and narrowband photography

The Triband-SCTs are based on Celestron's Schmidt-Cassegrains, a well-tried and reliable no-frills telescope system. That's why they are also compatile with a multitude of accessories which was developed for regular Schmidt-Cassegrains – starting with filter drawers like the UFC or focusers like the Baader Diamond SteelTrack with optional motor focuser or the Celestron Fokussiermotor #821160 up to reducers.

Unlike pure H-alpha-telescopes, you can use the Triband-SCT even at night: The coating is permeable for CaK, H-Beta, O-III, H-alpha and S-II, so that you can use the telescope fully for narrowband- or Ultra UHC-photography – be it with the original f/10, at night with a reducer or even with a Hyperstar-system at f/2. You can even use UV-filters (Baader U-Venus-Filter) or IR-Pass-Filter and achieve a surprisingly good contrast. The SC optical system suffers much less from chromatic aberration over a much broader spectral range than the best apochromatic lens telescopes. This makes the Baader-Triband-Schmidt-Cassegrains the most versatile CaK and H-alpha-telescopes on the market.

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M. Büchner 255/09/2021 13/09/202109:12
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Baader Triband SCT mit Baader SunDancer II H-alpha Filter - eine neue Welt mit Details
Die Unterschiede in den Details bei dem Triband SCT insbesondere bei der visuellen und fotografischen Sonnenbeobachtung sind frappierend.
Gerade in Kombination mit einem Solar Spectrum H-Alpha-Filter wie z.B. Sun Dancer II eröffnet sich bei gutem Seeing eine neue Welt mit Details, die bisher nur größeren Refraktoren ab 150mm vorbehalten war.
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In diesem Sommer haben wir Hr. Michael Büchner den neuen Baader SunDancer II H-alpha Filter und den Baader Triband-SCT zu Testzwecken zur Verfügung gestellt. Wir freuen uns sehr über sein positives Fazit und seinen Erfahrungsbericht.

Den ausführlichen Erfahrungsbericht von H. Büchner zum Baader SunDancer II H-alpha Filter finden Sie in unserem Blog:
SunDancer II: ein neuer H-alpha-Filter mit Blockfilter – ein Erfahrungsbericht
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Jiaifer 269/09/2018 27/09/201817:53
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Test of the C8 Baader Triband in France
After the meetings of the solar observers of Serbannes (France), I was able to carry out tests of the Tribands during 3 weeks. It is too much to evaluate all the possibilities of this instrument, but it is sufficiently representative.
The assais focused on the Ha, with a Solar Spectrum of 0.5 A and a DayStar Combo, and in white light with a simple Continuum Baader filter.
In visual, the image is very good if the seeing is good, of course.
In light balche, with a herschel, a Lacerta 2 ", it is very good, but the sky background lacks darkness in my opinion. The granulation is visible at 100/150 x. In imaging, the attached photos speak for themselves. They are here reduced in quality.

I did not have time to observe in CaH and did not have time either to do the sun gear.

This solar telescope seems to me to be an excellent instrument, to use with a good filter Ha and a good seeing, because the diameter is already important even for the C8.


I recommend this instrument to solar observers!
  • Good performances in Ha and white light in imaging
  • The only reserve is the background of sky not dark enough in white light and visual.
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Helmut Heinicke 126/05/2018 07/05/201814:44
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C8-Triband: Ein neuartiges Sonnenteleskop
Im Herbst 2017 wurde mir von der Firma Baader Planetarium ein Vorserienmodel dieser neuen Teleskopreihe für ausführliche Praxistests zur Verfügung gestellt: Ein Baader C8 – Triband. Ich habe mit diesem Teleskop bis in das Frühjahr 2018 beobachten können. Über die Wintermonate sind durch die tief stehende Sonne, und damit einhergehendem schlechtem Seeing, die Beobachtungen leider negativ beeinflußt worden. Später konnte das Potential des Teleskops aber ausgenutzt werden.

Ich habe für die Firma Baader Planetarium zwei Erfahrungsberichte erstellt:
Der erste Bericht behandelt die Kernkompetenz des Triband-SCT - die Sonnenbeobachtung - sowie ein Kurzbericht zu Mond- und Jupiterbeobachtung.
Der zweite Erfahrungsbericht behandelt ausführlicher die zusätzlichen Anwendungsgebiete, die mit dem Triband-SCT ebenfalls möglich sind, wie die fotografischen Mond- und Jupiterbeobachtung.

Beide Erfahrungsberichte habe ich Baader Planetarium als PDF zur Verfügung gestellt, diese können Sie im Download-Bereich einsehen.

Mein persönliches Fazit:
Das Baader C8 – Triband als kleinster Vertreter einer neuen SC-Teleskopreihe scheint mir ein sehr interessantes Teleskop zu sein, welches nicht allein zur Sonnenbeobachtung geeignet ist, sondern noch weitere Einsatzgebiete hat, z.B die Mondbeobachtung. Um die große Öffnung auch tagsüber bei Lufterwärmung nutzen zu können, sollte darauf geachtet werden, daß die nähere Umgebung des Aufstellungsortes nicht gar so viel Luftverwirbelung verursacht.
  • Große Öffnung und umfangreiche Einsatzgebiete
  • Ein kleiner Wermutstropfen ist bei fotografischer Beobachtung vorhanden, weil das Blidfeld bereits eines mittelgroßen Chips zu den Ecken nicht mehr ganz gut bedient wird. Das ist bei den SCs halt so. Bei visueller Beobachtung spielt das aber kaum eine Rolle
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Die Testberichte von Herrn Heinicke sind als PDF im Tab "Downloads" verlinkt bzw. über folgende Direktlinks zu erreichen:

Baader C8 – Triband, ein neuartiges Sonnenteleskop

Baader C8 – Triband bei fotografischen Mond- und Jupiterbeobachtungen
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