PlaneWave Instruments has developed a lineup of astrograph telescopes that meet the needs of advanced imaging applications.

Achieve stunning astrophotographs with DeltaRho’s wide fields of view and fast focal ratios that efficiently collect vast amounts of light. A perfectly flat field ensures exceptional clarity from corner to corner of the image without field curvature degrading the photos.

• Optical Tube Assembly only
• Corrected Cassegrain focus optical design
• Aperture: 508 mm (20″)
• Focal length: 1,537 mm
• Focal Ratio:  f/3.03
• 70mm Image Circle > 2.6 degrees
• Fixed Primary Mirror
• Collimation performed via 3 tip/tilt screws at the secondary mirror
• <9.166” (232.8 mm) from mounting surface (without focuser and rotator)
• Backfocus of 5.81″ (147.6mm) with Series-5XL focuser and Series-5 Rotator installed (with focuser at midpoint of travel range)
• Built-in primary and secondary dew heaters with temperature sensors
• Compatible with L-500 or 600 series direct drive mount