Celestron C14 14″ XLT Schmidt-Cassegrain Optical Tube Assembly


  • 14″ Schmidt-Cassegrain Optical Tube Assembly
  • Celestron’s premium StarBright XLT coatings
  • Aluminium Optical Tube
  • 3910 mm focal length (f/11)
  • 40 mm eyepiece included (98x)
  • Visual back for use with 2″ accessories
  • 9×50 finderscope to help accurately find objects
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • CGE/Losmandy dovetail rail options
Starbright XLT Coatings

Availability: In stock

Category: SKU: 91038XLT Tag:


The Celestron C14 SCT optical tube assembly (OTA) is their largest aperture telescope and offers great light gathering power (1593x that of the human eye). The telescope, due to its size and weight (21kg) is only available with the sturdy wide 3″ CGE/Losmandy bar for mounting on a suitable mount, with Celestron’s CGX or CGX-L (for astroimaging) being well suited.

The C14 features Celestron’s StarBright XLT coatings on the corrector plate for maximum light transmission. The telescope has a 3910mm focal length (f/11) making it a good overall performer on a range of celestial objects.

The telescope comes with a star diagonal for more comfortable viewing of high altitude objects and a 40mm Plossl eyepiece which gives 70x magnification. A 9×50 finderscope to help locate objects completes the package.

Optical DesignSchmidt-Cassegrain
Aperture355.5mm (14″)
Focal Length3910mm (154″)
Focal Ratiof/11
Focal Length of Eyepiece 140mm (1.57″)
Magnification of Eyepiece 198x
Star Diagonal2″ with 1.25″ adapter
Optical TubeAluminium
Fastar CompatibleYes
Highest Useful Magnification840x
Lowest Useful Magnification51x
Limiting Stellar Magnitude15.3
Resolution (Rayleigh)0.39 arc seconds
Resolution (Dawes)0.33 arc seconds
Light Gathering Power (Compared to human eye)2581x
Secondary Mirror Obstruction114mm (4.5″)
Secondary Mirror Obstruction by Diameter32%
Secondary Mirror Obstruction by Area10%
Optical CoatingsStarBright XLT
Optical Tube Length787mm (31″)
Optical Tube Diameter400.5mm (15.77″)
Optical Tube Weight46 lbs (21 kg)
DovetailCGE Dovetail Bar

Schmidt-Cassegrain Manual

Additional information

Weight27 kg
Celestron Technology


Optical Design