Baader Triband SCT telescopes are made to order. Contact us if you are interested!

The Baader Triband-SCT 11" is a Schmidt-Cassegrain telescope with an ERF-coated Schmidt corrector plate. This makes it suitable for high resolution solar observation and imaging without the need for an external energy rejection filter.

Note: For solar observation and imaging, an additional Herschel Prism or H-alpha solar filter is required! This could be the , or . 

The Triband-SCT combines Celestron's exceptional Schmidt-Cassegrain telescopes with Baader's D-ERF dielectric energy rejection filter, integrated into the corrector plate. The result is a large aperture solar telescope which can also be used for deep sky narrowband observing and imaging (think of it as a built-in UHC filter). Infrared radiation is blocked down to 1450nm to keep the tube cool and supress thermal currents which can ruin images.

Unlike traditional off-axis ERF solutions for solar imaging with SCTs, the Triband allows you to utilize the full aperture and optical quality of the telescope. Additional rear-ventilated heat shields in front of tube and secondary mirror also keep the tube from heating up by the sun's radiation.

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 coating passes not just H-alpha, but CaK, CaH, H-beta, O-III and S-II, so that you can use the telescope fully for narrowband imaging, be it at the original f/10, with a reducer at f/7 or even with a Hyperstar-system at f/2. You can even use UV-filters (such as the ) or IR-pass-filters and achieve 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.

Note: Additional filters, accessories and mount as shown in photos are not included with the telescope.

Usage

The Triband-SCT is an incredibly versatile instrument, but requires additional filtration depending on the use-case. For more info, check out the user manual.

• H-alpha: Solar Spectrum H-alpha filter with TZ-3 telecentric system and telecompressor TK0.4 or TK0.7, filter, or filter. An additional D-ERF filter is not required.

• CaK/CaH: Solar Spectrum CaK-filter or plus additional front Astrosolar filter or Hershel prism for observing the sun in CaK, or .

• White light: plus optional bandpass filters such as the or O-III Super-G 9nm filter.

• Deep-Sky (not for solar observations!): Deep-sky filters according to your field of interest (RGB / H-beta / O-III / H-alpha / S-II).

Specifications

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