USED C6 Optical Tube Assembly (91010-XLT)
USED C6 Optical Tube Assembly (91010-XLT)


USED C6 Optical Tube Assembly (91010-XLT)

Regular price
$ 710.00 Sold out
Sale price
$ 710.00
Unit price


  • This USED telescope OTA is in good condition
  • Comes with locking JMI Case, finder scope, diagonal and eyepiece
  • 6" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 1500 mm focal length (f/10)
  • 25 mm eyepiece included (60x)
  • Visual back allows for use with 1.25" accessories
  • 6x30 finderscope to help accurately find objects
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • Includes dovetail rail compatible with CG-5 Advanced Series mount



    Optical Design Schmidt-Cassegrain
    Aperture (mm) 150 mm (5.91 in)
    Focal Length 1500 mm (59 in)
    Focal Ratio 10
    Focal Length of Eyepiece 1 (mm) 25 mm (0.98 in)
    Magnification of Eyepiece 1 60 x
    Finderscope 6x30
    Star Diagonal 1.25
    Optical Tube Aluminum - black
    Fastar Compatible Yes
    Highest Useful Magnification 354 x
    Lowest Useful Magnification 21 x
    Limiting Stellar Magnitude 13.4
    Resolution (Rayleigh) 0.93 arc seconds
    Resolution (Dawes) 0.77 arc seconds
    Light Gathering Power (Compared to human eye) 459 x
    Apparent Field of View .83 °
    Linear Field of View (@1000 yds) 44 ft (13 m)
    Secondary Mirror Obstruction 2.2 in (56 mm)
    Secondary Mirror Obstruction by Diameter 37%
    Secondary Mirror Obstruction by Area 14%
    Optical Coatings StarBright XLT
    Optical Tube Length 16 in (406 mm)
    Optical Tube Weight 10 lbs (4.54 kg)

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