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Celestron C9 1/4-A XLT 9.25" f/10 Schmidt-Cassegrain Telescope (OTA Only, CGE Dovetail)
Celestron C9 1/4-A XLT (CGE) Optical Tube Assembly

Celestron C9 1/4-A XLT 9.25" f/10 Schmidt-Cassegrain Telescope (OTA Only, CGE Dovetail)

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Your Price: CAD1,879.00
Retail Price:CAD1,899.00

Your Savings:CAD20.00(1%)

Usually ships in 5-7 business days
Part Number:91027-XLT

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Product Highlights

  • 9.25" Schmidt-Cassegrain OTA
  • 2350mm focal length, f/10 Focal Ratio
  • StarBright XLT Optical Coatings
  • 25mm Eyepiece, 90° Diagonal
  • 6x30 Finderscope
  • CGE (Losmandy) Dovetail Plate
  • OTA Only; Mount and Tripod Required

Outfitted with a large aperture, long effective focal length, and their proprietary StarBright XLT optical coatings, the Celestron C9 1/4-A XLT 9.25" f/10 Schmidt-Cassegrain Telescope provides power and portability. The coating system consists of anti-reflection coatings on the corrector plate, highly reflective index mirror coatings, and low-absorption/high-transmission glass components to ensure that the maximum amount of light is gathered and transmitted to the user's eye. This system ensures bright and clear high-contrast images with accurate color rendition across the entire visual spectrum without visible distortion at the edges. Celestron includes a standard 1.25" visual back to accept eyepieces and accessories such as the 25mm eyepiece and 90° diagonal supplied with the optical tube assembly (OTA). This OTA is offered here without a mount or tripod for users who already have a support system. Just ensure the mount's payload capacity exceeds 20 pounds to safely carry the weight, and has a Losmandy-style saddle to match the OTA's CGE mounting plate.

Optical Tube
  • 9.25" (235mm) aperture
  • f/10 focal ratio
  • 2350mm effective focal length
  • Schmidt-Cassegrain design optical path
  • StarBright XLT optical coatings
  • Resolution: 0.59 arcsec (Rayleigh); 0.49 arcsec (Dawes)
  • Secondary mirror obstruction: 3.35" (85 mm); 36% by diameter; 13% by area
StarBright XLT System
  • Maximizes light transmission through optical path
  • Improves color rendition, contrast, sharpness, resolution, and brightness
  • Broad-band system provides flat wavelength transmission across the entire visual spectrum
  • Multi-layer mirror coatings with layers of aluminum, SiO2 (quartz), and TiO2 (titanium dioxide)
  • Multi-layer anti-reflective corrector plate coatings with layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide). Hafnium has a wider band-pass than the commonly used titanium
  • High-transmission water white glass corrector plate limits light loss due to internal absorption
Mounting
  • Optical tube only - Mount and tripod required for proper use
  • Supplied with CGE dovetail plate that is compatible with Losmandy-style saddles
  • Mount must have a payload capacity of over 20 pounds to safely support the OTA
Included Accessories
    Visual back:
  • Standard threads for SCT optical tubes
  • 1.25" eyepiece holder accepts 1.25" eyepieces and accessories
    Eyepiece:
  • 1.25" diameter barrel
  • Accepts most 1.25" astronomical filters
  • 25mm focal length produces 94x magnification
    Diagonal:
  • 1.25" diameter barrel
  • 90° angle places head in comfortable viewing position when scope is aimed at or near the zenith
  • Star diagonal corrects view horizontally, but not vertically
    Finderscope:
  • 6x magnification
  • 30mm aperture
  • Mounting bracket included
 

Specifications

Optical Design Schmidt-Cassegrain
Aperture 9.25" / 234.95mm
Focal Length 2350 mm
Focal Ratio f/10
Eyepiece Barrel Diameter 1.25"
Diagonal 90° star
1.25" barrel
Finderscope 6x30 mm
Tripod None
Mount Type CGE dovetail plate
Power Source None
Optical Tube Length 22" / 55.9 cm
Weight 20.0 lbs / 9.11 kg
Packaging Info
Package Weight 31.05 lb
Box Dimensions (LxWxH) 29.0 x 18.0 x 16.0"


In the Box
Celestron C9 1/4-A XLT 9.25" f/10 Schmidt-Cassegrain Telescope (OTA Only, CGE Dovetail)
  • 25mm Eyepiece
  • 1.25" 90° Diagonal
  • SCT Visual Back
  • 6x30mm Finderscope
  • Universal Mounting Plate, CGE
  • Limited 2-Year Warranty

  • Based on Astronomy magazine’s telescope "report cards", scopes of this size and type generally perform as follows . . .


    Terrestrial Observation:No
    Lunar Observation:Very Good
    Planetary Observation:Very Good
    Binary and Star Cluster Observation:Very Good
    Galaxy and Nebula Observation:Very Good
    Photography:Yes
    Terrestrial Photography:No
    Lunar Photography:Yes
    Planetary Photography:Yes
    Star Cluster / Nebula / Galaxy Photography:Yes


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