Telescopes and Telescope Accessories from Celestron, Meade, iOptron, Zhumell and More at
GUEST#   0
Telescopes Super Sale

Celestron C8-A Schmidt-Cassegrain Optical Tube Assembly

Item# CELE315
Be The First To Write a Review
Customer Q & A
1. Model Type:
CGE Dovetail
CG-5 Dovetail


$1,039.00 to $1,049.00

List Price: $1709.95 to $1729.95
Save 39%
Free Shipping with Economy Service
or to get it as soon as Wednesday with FedEx 1 Day when you buy today

View All Shipping Options

to get it as soon as Wednesday with FedEx 1 Day when you buy today

View All Shipping Options

Add To Cart
Details & Dimensions
Guarantee & Returns
  • 8-inch Schmidt-Cassegrain aluminum optical tube assembly
  • Long 80-inch focal length and 81X magnification
  • Features Celstron's premium StarBright XLT coatings
  • Accurately spot celestial objects with the 6x30 finderscope
  • Includes a 25mm eyepiece with 81x magnification


  • 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 or CG-5 mount (select option) 



  • OPTICAL DESIGN:  Schmidt-Cassegrain 
  • APERTURE:  203.2 mm (8 in) 
  • FOCAL LENGTH:  2032 mm (80 in) 
  • FOCAL RATIO:  f/10
  • FINDERSCOPE:  6x30 
  • OPTICAL TUBE:  Aluminum 
  • EYEPIECE 1:  25 mm (0.98 in) 
  • MAGNIFICATION 1:  81 x 
  • STAR DIAGONAL:  1.25 
  • SECONDARY MIRROR OBSTRUCTION:  2.5 in (63.5 mm) 
  • OPTICAL TUBE LENGTH:  17 in (431.8 mm)
  • OPTICAL TUBE WEIGHT:  12.5 lb (5.67 kg)



About Celestron Schmidt-Cassegrain Telescopes


Celestron’s excellent Schmidt-Cassegrain telescopes are compact and portable and represent the best all-purpose design for a wide variety of uses from terrestrial and deep sky viewing to astrophotography.

Catadioptrics use a combination of mirrors and lenses to "fold" (reflect) the light path and form an image. In a Schmidt-Cassegrain, the light enters through a thin aspheric Schmidt correcting lens. It then strikes the spherical primary mirror. It is reflected back up the tube and intercepted by a small secondary mirror which reflects the light out an opening in the rear of the instrument where the image is formed at the eyepiece.

Catadioptrics are the most popular and most modern type of telescope optical design and are marketed throughout the world in 3.5" and larger apertures. Catadioptric telescopes combine the practical advantages of lenses and mirrors while eliminating their disadvantages. They offer the clarity and contrast of refractors with the low aberration of reflectors. Catadioptrics have an average focal ratio of f/10, which is wide enough for all types of photography. They are also easier to maintain because all optical elements are solidly mounted and rigidly collimated. Catadioptric telescopes provide the best possible combination of light gathering power, long focal length, portability and affordability.


Schmidt-Cassegrain Advantages


  • Very versatile, best all-purpose telescope design
  • Combines the optical advantages of both lenses and mirrors while eliminating their disadvantages
  • Excellent optics and razor sharp images over a wide field
  • Excellent for deep sky observing and astrophotography as well as terrestrial viewing
  • Very good for lunar, planetary and binary star observing
  • Focal ratio generally around f/10, it also has the best near focus capability of any type of telescope
  • Closed tube design reduces image-degrading air currents
  • Extremely compact and portable
  • Easy to use, durable and virtually maintenance free
  • Large apertures at reasonable cost and less expensive than equivalent aperture refractors
  • More accessories available than with other types of telescopes


Schmidt-Cassegrain Disadvantages


  • More expensive than Newtonians of equal aperture
  • Slight light loss due to secondary mirror obstruction compared to refractors The Maksutov-Cassegrain is similar to the Schmidt-Cassegrain with essentially the same advantages and disadvantages. It uses a thick meniscus correcting lens with a strong curvature and a secondary mirror that is usually an aluminized spot on the corrector. The Maksutov secondary

Shipping Restrictions:
Available for shipment to the USA and Canada only.

Dimensions & Specifications


17 inches


12.5 lbs.

Recommended Usage



2-Year Limited


StarBright XLT Optical Coating





Telescopes Series

Celestron Optical Tubes

Optical Design




Focal Length


Focal Ratio


Eyepiece 1

25mm (81x)

Highest Useful Magnification


Star Diagonal

1.25 diagonal prism

User Level

For the Expert


14 Limiting Magnitude


Model Type:

Celestron C8-A Schmidt-Cassegrain Optical Tube Assembly
iOptron MAK 150mm Maksutov-Cassegrain OTA
iOptron MAK 150mm Maksutov-Cassegrain OTA
Sky-Watcher PRO 120ED APO Refractor OTA
Sky-Watcher PRO 120ED APO Refractor OTA
Vixen VMC110L Modified Cassegrain OTA
Vixen VMC110L Modified Cassegrain OTA
Meade Series 6000 130mm ED Triplet APO Refractor Telescope
Meade Series 6000 130mm ED Triplet APO Refractor Telescope
Meade Series 6000 80mm ED Triplet APO Refractor Telescope
Meade Series 6000 80mm ED Triplet APO Refractor Telescope

The Perfect Accessories

Customer Q & A

Ask a Question  

Have a question about this product? Ask a Product Expert! The answer will be emailed to you and then posted here.

Satisfaction Guaranteed
GUEST#   0
Hayneedle, Inc., Internet Shopping, Omaha, NE is a Hayneedle Inc. store. Copyright 2007 - 2015 , Hayneedle Inc., all rights reserved.