APO refractors have a doublet field flattener to get a flat field and minimize aberration and distortion. Their wide 48mm opener ensures a larger and clearer aperture and also extremely minimized halation. Connect the triplet and doublet field flattener with a high precision thin thread to keep the optical axis perpendicular to the image.

  • Premium optical materials 
  • Short focal length and full frame corrected focal plane 
  •  Excellent field flatness 
  •  Precision linear power focuser is standard 
  •  Metallic high-transmission lens coatings 
  •  Light-baffled optical systems 
  •  Telescope tube attachment hardware
  •  Full-frame Corrected Focal Plane
  •  Zero detectable Colour Fringing even on Bright Objects
  •  Knife-edge Baffled Optical System


  • Optical Design: Apochromatic Refractor 
  • Optical Diameter: 120mm 
  • Focal Length: 840mm 
  • F/Ratio: F/7 
  • Highest Practical Power: 240x 
  • Faintest Steller Magnitude: 12.5 
  • Finder Scope: 8×50 Right Angled Erect Image 
  • Focuser Diameter: 3″ Linear Power Focuser 
  • Diagnol: 2″ 90 deg. Dielectric Diagonal with 1.25″ adapter 
  • Eyepieces: LET 2″-28mm 
  • Tube Weight: 9.61 kg 
  • Tube Dimensions: 12.5cmx75cm 
  • Shipping Weight: 26 kg 
  • Shipping Dimensions: 122x46x48 cm3