TS Optics Ritchey-Chretien RC 152/1370 OTA (20900)

This telescope is a recently developed model from GSO, now offered at a more accessible price. It is particularly well-suited for astrophotography because it is a pure reflection system, eliminating chromatic aberration. The optical design uses a hyperbolic primary mirror and a convex hyperbolic secondary mirror, delivering a coma-free image with a wide field of view. The open tube and quartz mirrors allow for quick cooling and minimal dew issues. The system is also suitable for infrared photography.

Main 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: 152 mm

• Focal length: 1370 mm

• Aperture ratio: f/9

• Resolving capacity: 0.76 arcseconds

• Limiting magnitude: 12.7

• Light gathering capacity: 470

• Maximum useful magnification: 304x

• Tube weight: 5.4 kg

• Tube length: 500 mm

• Tube diameter: 191 mm

• Tube construction: Full tube

• Tube material: Steel

Reflector Details

• Primary mirror: Hyperbolic, made of quartz

• Reflectivity: 99%

• Secondary mirror obstruction: 50%

Focuser

• Type: Crayford

• Eyepiece connection: 2 inches

• Backfocus: 159 mm

• Camera-side threaded socket: M90x1

Mount

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

• No GoTo control

Included Accessories

• Prism rail (Vixen-style)

Areas of Application

• Moon and planets: Yes

• Nebulae and galaxies: Yes

• Nature observation: Yes

• Astrophotography: Yes (very good)

• Solar observation: No (only possible with a suitable solar filter)

Recommended For

• Beginners: No

• Advanced users: Yes

• Observatories: No