USED C6 Optical Tube Assembly - Like New
USED C6 Optical Tube Assembly - Like New


USED C6 Optical Tube Assembly - Like New

Regular price
$ 475.00 Sold out
Sale price
$ 475.00
Unit price


  • This USED 6" Schmidt-Cassegrain Optical Tube Assembly is in Like New Condition (has never been used) 
  • Aluminum Optical Tube - Silver Paint
  • Celestron's premium StarBright XLT coatings
  • 1500 mm focal length (f/10)
  • 13 mm eyepiece included 
  • Visual back allows for use with 1.25" accessories
  • Starpointer red dot finder 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) 13 mm 
Magnification of Eyepiece 1 115 x
Finderscope Star Pointer
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)
Dovetail Compatibility CG-5 Mount

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