TS Optics Ritchey-Chretien RC 203/1624 Pro Carbon OTA Losmandy-Style (20901)

This telescope is a newly developed model from GSO, now offered at a more affordable price. It is especially suitable for astrophotography because it is a pure reflection system, eliminating chromatic aberration. The design uses two mirrors: a hyperbolic primary mirror and a convex hyperbolic secondary mirror. This results in a coma-free image with a wide field of view. The open tube design and quartz mirrors allow for quick cooling and minimal dew problems. The system also supports infrared photography.

Key Advantages

• Ideal for astrophotography

• No chromatic aberration

• Open tube design for efficient cooling

TS Optics is a brand of Teleskop-Service.

Specifications

Optics

• Type: Reflector

• Optical design: Ritchey-Chretien

• Aperture: 203 mm

• Focal length: 1624 mm

• Aperture ratio: f/8

• Resolving capacity: 0.57 arcseconds

• Limiting magnitude: 13.3

• Light gathering capacity: 840

• Maximum useful magnification: 406x

• Tube weight: 6.2 kg

• Tube length: 580 mm

• Tube material: Carbon

• Tube construction: Full tube

• Stray light baffles: Yes

Reflector Details

• Main mirror: Hyperbolic, quartz material

• Reflectivity: 99%

• Secondary mirror diameter: 85 mm

Focuser

• Type: Monorail

• Camera-side threaded socket: M90

• Rotating: Yes

• Gear reduction: 1:10 for fine focusing

• Eyepiece connection: 2 inches

Mount

• Optical tube assembly (OTA) only, no mount included

• No GoTo control

Included Accessories

• Prism rail (Losmandy-style)

• Extension tubes

• Finder base (Vixen/Skywatcher level)

• Eyepiece adaptor (2" / 1.25")

Areas of Application

• Moon and planets: Yes

• Nebulae and galaxies: Yes

• Nature observation: Yes

• Astrophotography: Yes

• Solar observation: Not recommended (only with appropriate solar filter)

Recommended For

• Beginners: No

• Advanced users: Yes

• Observatories: No