ArteSky ARTEC Newton Astrographen

Each optical set is selected to match the telescope’s overall precision:

• Reflectivity > 95%
• Correction of λ/8 or better
• Strehl Ratio ≥ 0.95

Each optical set is selected to match the telescope’s overall precision:

• Reflectivity > 95%
• Correction of λ/8 or better
• Strehl Ratio ≥ 0.95

High-Performance Optics – Quartz Mirrors, Superior Coatings

• Optical design: Classic Newtonian
• Primary mirror diameter: 206mm (conical quartz)
• Secondary mirror diameter: 88mm
• Native focal ratio: f/4.0
• Focal length: 800mm (912mm with coma corrector)
• Included coma corrector: 1.14x, resulting in f/4.5
• Mirror material: High-grade quartz with >95% reflectivity
• Optical correction: λ/8 or better
• Strehl ratio: ≥ 0.95
• Linear obstruction: 44%
• Fully illuminated field: 39mm
• Corrected field: 55mm – ideal for full-frame sensors

ARTEC astrographs employ optics that match the mechanical precision of the instrument. Key specifications include:

• Reflectivity greater than 95%
• Surface correction of λ/8 or better
• Strehl ratio of 0.95 or higher