ASA EQ800 Ritchey-Chrétien equatorial telescope f6.85

ASA EQ800 – 0.8-Meter Equatorial Telescope System

Precision-engineered for high-performance equatorial operation.

The ASA EQ800 is a fully integrated 0.8-meter Ritchey-Chrétien equatorial telescope system, purpose-built for advanced imaging and research applications. Designed with a system focal ratio of f/6.85, this equatorial configuration offers smooth sidereal tracking and outstanding stability for deep-sky astrophotography. With a fused silica primary mirror and precision optical surfaces, the system delivers diffraction-limited performance and minimal microroughness—ideal for capturing faint, high-resolution targets.

Key Specifications

Optical Design: Ritchey-Chrétien (RC)
Clear Aperture: 800mm (31.5 in)
Clear Aperture / Focal Ratio Primary Mirror: f/2.5
System Focal Ratio: f/6.85
Focal Length: 5480mm
Image Field: 120mm (1.25°)
Central Obstruction: 41% (linear)
Mirror Material: Fused Silica
Surface Quality: >94 Strehl
Microroughness: 1nm RMS / <0.7nm Ra
Coating: Al + SiO₂, Reflectivity >91%
Back Focus from Flange: 345.73mm
Total Weight: 800 kg (1,764 lbs)