PlaneWave RC20 F/7 OTA

PlaneWave RC20 – 20-Inch Ritchey-Chrétien Telescope System

A compact, high-precision RC instrument engineered for demanding astronomical research and astrophotography.

The PlaneWave RC20 telescope system features a 20-inch (508mm) aperture and a classic Ritchey-Chrétien optical design—delivering superb image quality, reduced optical aberrations, and excellent contrast. The carbon-fiber dual-truss construction ensures stability, strength, and minimal thermal expansion, making the RC20 an ideal instrument for observatories seeking sharp, professional-grade imagery and reliable performance.

Key Specifications

Optical Design: Ritchey-Chrétien (RC)
Clear Aperture: 508mm (20 in)
Focal Ratio: f/7
Focal Length: 3556mm
Back Focus: 147mm from fully racked-in focuser
Construction: Dual carbon-fiber truss design
Weight Class: Lightweight yet rigid for high-performance mounting
Focus Position: Cassegrain / Instrument side

Performance & Applications

High-Resolution Imaging:

- Optimized for reduced off-axis coma and astigmatism

- Delivers a flat, high-contrast field ideal for large-format CCDs

Scientific Research:

- Suitable for photometry, astrometry, and spectroscopy

- Supports professional observatory installations

Construction Benefits:

- Carbon fiber materials minimize thermal distortion

- Lightweight frame enables fast slewing and easier mount integration

Let me know if you'd like a matching layout for a mount or another OTA!