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Celestron XLT Optical Tubes

Celestron XLT Optical Tubes
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Select Telescope: Celestron C6-A XLT OTASelect Telescope: Celestron C8-A XLT OTA (Vixen dovetail)Select Telescope: Celestron C8-A XLT OTA (CGE)Select Telescope: Celestron C9.25-A XLT OTA (Vixen dovetail)
Select Telescope: Celestron C9.25-A XLT OTA (CGE)Select Telescope: Celestron C11-A XLT OTA (Vixen dovetail)Select Telescope: Celestron C11-A XLT OTA (CGE)Select Telescope: Celestron C14-AF XLT (CGE) Fastar OTA
Price:  £1,067.00
List Price:  £1,129.00
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Product Code:  91020-XLT
Manufacturer:  Celestron

Celestron


Celestron Schmidt-Cassegrain Optical Tube Assemblies (OTA) are available individually for use with your favorite mount. Each OTA is made to the same exacting standards as those used on all our high quality telescopes. All optical surfaces are coated with Celestron’s high efficiency StarBright® multi-layered coating group. These tube assemblies are equipped with the same dovetail mounting bar used on the CGE and Advanced Series for easy attachment to a variety of popular mounts.

General Features C6-A-XLT:

  •     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

General Features C8-A XLT OTA:

  •     8" Schmidt-Cassegrain Optical Tube Assembly
  •     Aluminum Optical Tube
  •     Celestron's premium StarBright XLT coatings
  •     2032 mm focal length (f/10)
  •     25 mm eyepiece included (81x)
  •     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 CGE mount

General Features C9.25-A XLT OTA:

  • 9.25" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2350 mm focal length (f/11)
  • 25 mm eyepiece included (94x)
  • 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 CGE mount

General Features C11-A XLT OTA:

  • 11" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2800 mm focal length (f/10)
  • 40 mm eyepiece included (70x)
  •  Visual back allows for use with 1.25" accessories
  • 9x50 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 CGE

General Features C14-AF XLT (CGE) Fastar OTA:

  • 14" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Fastar Compatible
  • Celestron's premium StarBright XLT coatings
  • 3910 mm focal length (f/11)
  • 40 mm 1.25" eyepiece included (98x)
  • Visual back allows for use with 2" accessories
  • 9x50 finderscope to help accurately find objects
  • 2" mirror diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • Includes dovetail rail compatible with CGE mount

Specifications C6-A XLT OTA:

  • OPTICAL DESIGN  : Schmidt-Cassegrain 
  • APERTURE  : 150 mm (5.91 in) 
  • FOCAL LENGTH  : 1500 mm (59.06 in) 
  • FOCAL RATIO  : 10 
  • EYEPIECE 1  : 25 mm (0.98 in) 
  • MAGNIFICATION 1  : 60 x 
  • FINDERSCOPE  : 6x30 
  • STAR DIAGONAL  : 1.25 
  • OPTICAL TUBE : Aluminum black 
  • FASTAR COMPATIBLE  : No 
  • HIGHEST USEFUL MAGNIFICATION : 354 x 
  • LOWEST USEFUL MAGNIFICATION  : 21 x 
  • LIMITING STELLAR MAGNITUDE : 13.4 
  • RESOULTION (RAYLEIGH) : 0.93 arcsec 
  • RESOLUTION (DAWEWS) : 0.77 arcsec 
  • LIGHT GATHERING POWER : 459 x 
  • ANGULAR FIELD OF VIEW : 0.83 ° 
  • LINEAR FIELD OF VIEW (@1000 yds)  : 44 ft (13.41 m) 
  • SECONDARY MIRROR OBSTRUCTION: 2.2 in (55.88 mm) 
  • SECONDARY MIRROR OBSTRUCTION BY DIAMETER : 37.3 % 
  • SECONDARY MIRROR OBSTRUCTION BY AREA : 13.9 % 
  • OPTICAL COATINGS : StarBright XLT 
  • OPTICAL TUBE LENGTH: 16 in (406.4 mm)
  • OPTICAL TUBE WEIGHT: 10 lb (4.54 kg) 
  • DOVETAIL COMPATIBILITY : CG-5 Mount

Specifications C8-A XLT OTA:

  • Optical Design: Schmidt-Cassegrain
  • Aperture (mm): 203.2 mm (8 in)
  • Focal Length: 2032 mm (80 in)
  • Focal Ratio: 10
  • Focal Length of Eyepiece 1 (mm): 25 mm (0.98 in)
  • Magnification of Eyepiece 1: 81 x
  • Finderscope: 6x30
  • Star Diagonal: 1.25
  • Optical Tube: Aluminum
  • Highest Useful Magnification: 480 x
  • Lowest Useful Magnification: 29 x
  • Limiting Stellar Magnitude: 14
  • Resolution (Rayleigh): 0.69 arc seconds
  • Resolution (Dawes): 0.57 arc seconds
  • Light Gathering Power (Compared to human eye): 843 x
  • Secondary Mirror Obstruction: 2.5 in (64 mm)
  • Secondary Mirror Obstruction by Diameter: 31%
  • Secondary Mirror Obstruction by Area: 9.77%
  • Optical Coatings: StarBright XLT
  • Optical Tube Length: 17 in (432 mm)
  • Optical Tube Weight: 12.5 lbs (5.67 kg)
  • Dovetail Compatibility: CGE Mount

Specifications C11-A XLT OTA:

  • Optical Design: Schmidt-Cassegrain
  • Aperture (mm): 279.4 mm (11 in)
  • Focal Length: 2800 mm (110 in)
  • Focal Ratio: 10
  • Focal Length of Eyepiece 1 (mm): 40 mm (1.57 in)
  • Magnification of Eyepiece 1: 70 x
  • Finderscope: 9x50
  • Star Diagonal: 1.25
  • Optical Tube: Aluminum
  • Highest Useful Magnification: 660 x
  • Lowest Useful Magnification: 40 x
  • Limiting Stellar Magnitude: 14.7
  • Resolution (Rayleigh): 0.5 arc seconds
  • Resolution (Dawes): 0.42 arc seconds
  • Light Gathering Power (Compared to human eye): 1593 x
  • Secondary Mirror Obstruction: 3.75 in (95 mm)
  • Secondary Mirror Obstruction by Diameter: 34%
  • Secondary Mirror Obstruction by Area: 12%
  • Optical Coatings: StarBright / XLT
  • Optical Tube Length: 24 in (610 mm)
  • Optical Tube Weight: 27.5 lbs (12 kg)
  • Dovetail Compatibility: CGE Mount

Specifications C14-AF XLT:

  • Optical Design: Schmidt-Cassegrain
  • Aperture (mm): 355.6 mm (14 in)
  • Focal Length: 3910 mm (154 in)
  • Focal Ratio: 11
  • Focal Length of Eyepiece 1 (mm): 40 mm (1.57 in)
  • Magnification of Eyepiece 1: 98 x
  • Finderscope: 9x50
  • Star Diagonal: 1.25
  • Optical Tube: Aluminum
  • Fastar Compatible: Yes
  • Highest Useful Magnification: 840 x
  • Lowest Useful Magnification: 51 x
  • Limiting Stellar Magnitude: 15.3
  • Resolution (Rayleigh): 0.39 arc seconds
  • Resolution (Dawes): 0.33 arc seconds
  • Light Gathering Power (Compared to human eye): 2581 x
  • Secondary Mirror Obstruction: 4.5 in (114 mm)
  • Secondary Mirror Obstruction by Diameter: 32%
  • Secondary Mirror Obstruction by Area: 10%
  • Optical Coatings: StarBright XLT
  • Optical Tube Length: 31 in (787 mm)
  • Optical Tube Weight: 45 lbs (20 kg)
  • Dovetail Compatibility: CGE Mount

 

 
 

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