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TS-Optics GSO 10″ RC Pro Carbon Truss

CHF 2'899.00incl. Swiss VAT

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Timeframe: 10 days to 3 weeks
Estimated shipping: Between December 1 and 6, 2026

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Product description

Product description

TS-Optics GSO 10″ RC Pro Carbon Truss 250/2000 – The High-End Astrograph

The TS-Optics GSO 10″ Ritchey-Chrétien (250 mm, 2000 mm, f/8) with carbon truss tube is a dream instrument for astrophotography. Designed on the same principle as large professional telescopes, it offers a corrected field of view, exceptional focus stability and robust mechanics suitable for heavy setups.

Highlights

  • Genuine Ritchey-Chrétien hyperbolic mirrors → coma-free, flat field.
  • Quartz mirrors (fused silica) stability of focus during thermal variations.
  • Reflectivity 94 % bright image, enhanced contrast, direct signal gain.
  • Carbon truss tube : maximum rigidity, focus that barely varies during long exposure.
  • Primary ventilation + open tube : rapid heat-up.
  • Two Losmandy dovetails sturdy mounting and accessories (guidescope, piggyback).
  • MONORAIL 3″ Focuser rigidity, 360° rotation, fine gearing, high load capacity (~5 kg).
  • Adjustable focuser tilt Focuser and primary decoupled to perfectly correct the perpendicularity of the optical train.

Astrophotography

The 10″ RC allows you to use the sensors up to APS-C with no corrector, delivering razor-sharp images. For the full formatIn order to obtain a perfectly flat field, we recommend the use of an RC corrector. With the CCD47 reducer 0.67×the focal length is reduced from 2000 mm to around 1340 mm, and the f/8 ratio to f/5,36reducing exposure time by more than half, while widening the field of view.

Why a carbon truss tube?

The weight reduction is minimal (~500 g), but the focus stability temperature variations is incomparable. The carbon has virtually zero expansion, guaranteeing long, refocus-free sessions. The truss structure maintains collimation perfectly, whatever the position of the telescope, while facilitating ventilation.

The MONORAIL 3″ Focuser

An evolution of the classic Crayford, the 3" Monorail" is based on a solid stainless steel slide, preventing tilt even with heavy optical trains. It features a stroke of approx. 80 mm, a clear aperture of 68 mm, a 1:10 gear ratio for fine adjustment, 360° rotation and dedicated threads (M77x0.75 female, M74x0.75 male, M68 internal) for optimum compatibility (correctors, OAG, heavy cameras).

RC vs SCT/Mak advantages

  • No Schmidt blade : less fogging, maximum transmission, near-infrared use possible.
  • Path 100 % reflective no permanent lens, more useful photons for the sensor.
  • No mirror shift : fixed primary, MAP via external focuser → impeccable stability.

In the box

  • 10-inch f/8 Carbon Truss RC Telescope
  • MONORAIL 3″ Focuser (+ 2″ and 1.25″ adapters)
  • Two Losmandy dovetails
  • M117 extension rings (2×25 mm, 1×50 mm)
  • Protective cap

In a nutshell

The TS-Optics GSO 10-inch RC Pro Carbon Truss is a benchmark for deep-sky imaging: wide, corrected field, focusing stability thanks to carbon + quartz, robust mechanics with tiltable focuser and support for heavy optical trains. A telescope designed for the demanding astrophotographer aiming for results worthy of professionals.

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Frequently asked questions

Frequently asked questions

What can you see with the TS-Optics GSO RC 10″?

With a 250-mm aperture at f/8 and a focal length of 2,000 mm, it is primarily an astrophotography telescope: when used with a camera, it is designed to photograph small objects—galaxies, planetary nebulae, and globular clusters—which it displays in great detail.

Is it easy to carry?

It can still be transported by car: the tube weighs about 16.5 kg.

Should we aim it at him?

Yes, from time to time: a Ritchey-Chrétien telescope requires precise alignment of its two mirrors, especially after being transported. A collimation tool for a Ritchey-Chrétien telescope makes it easier to adjust, and you can then fine-tune it using a star.

Can we take pictures?

Yes, that's what it's designed for: it mounts on a motorized equatorial mount (not included) with an astro camera or a regular camera. At f/8 and a focal length of 2000 mm, it requires precise tracking: be sure to use autoguiding for long exposures. With a tube weighing approximately 16.5 kg (without accessories), choose a mount with a load capacity that leaves some margin.

What's in the box?

Ritchey-Chrétien optical tube, 250/2000 mm (carbon fiber), 3″ dual-speed eyepiece holder (1:10), 2″ and 1.25″ adapters, 2 Losmandy dovetails.

Technical specifications

Technical specifications

Technical specifications

Optical type
Ritchey-Chrétien
Diameter
250 mm
Focal length
2,000 mm
Focal Ratio (f/D)
f/8.0
Maximum magnification
500 ×
Separating power
0.46″
Lens holder
3″ MONORAIL (M-LRN) with a 1:10 gear ratio, 2″ and 1.25″ reduction ratios
Backfocus
210 mm from the M117×1 male thread
Corrector / Reducer Available
Yes
Tube weight
16.5 kg
Uses
Deep Sky, Astrophotography
Recommended Products (1)

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