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Celestron CGEM 800 Schmidt-Cassegrain Telescope

Item # HN-CELE309

Dimensions & Specifications

Mount Design
2-Year Limited
Recommended Usage
Viewing the Planets, Viewing Galaxies/Star Clusters, Viewing Nebulae, Astrophotography, Viewing the Moon
StarBright XLT Optical Coating
GoTo, Equatorial Mount
88 lbs.
Optical Design
Focal Length
Highest Useful Magnification
Star Diagonal
1.25 diagonal prism
Object Database
40000 objects
Eyepiece 1
25mm (81x)
14 Limiting Magnitude
Focal Ratio
User Level
For the Expert
Telescopes Series
Celestron CGEM Telescopes

Product Guarantee

Manufacturer Warranty

Return & Exchange Policy

Full Description
Guarantee & Returns
Customer Reviews


by PowerReviews
Celestron CGEM 800 Schmidt-Cassegrain Telescope

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

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(1 of 1 customers found this review helpful)


CGEM 800 - At first...

By Jason

from Montague, TX

Verified Buyer


  • ease of use after setup
  • Sturdy mount


  • Hand control unintuitive
  • Poor manual

Best Uses

  • Visual observing

Comments about Celestron CGEM 800 Schmidt-Cassegrain Telescope:

So far I only use the CGEM 800 for astronomical viewing (no astrophotography yet).

The good:
The telescope creates good views of objects after setting up. The mount has decent customization and is nice to use a computer connected via the RS-232 remote port. The collimation (per the instruction booklet) was quick and easy but was very close after the unboxing.

The bad:
The first few alignment tries were taxing. Most of the problems are user incurred but could be avoided had the hand control been more intuitive (arrow keys only slew the telescope and do not navigate the menus).

Now if the weather will only warm up! All the steel in the mount and the cold air make controlling it difficult with numb fingers.

Service and delivery comments:

Delivery was within a few days and had no defects. Note that a representative will call you the day of or the day after for anti-fraud issues.

(17 of 17 customers found this review helpful)


Excellent Scope

By Uppie

from Murrieta, CA

About Me Casual/ Recreational

Verified Buyer


  • Accurate
  • Strong Construction


  • Heavy

Best Uses

  • Astronomy

Comments about Celestron CGEM 800 Schmidt-Cassegrain Telescope:

After years of dreaming about getting a nice scope I finally decided on the Celestron CGEM 800 and couldn't be happier with my decision. It is extremely easy to set up and align. After a couple of nights I perfected the two star alingment as well as the polar alignment of the scope. Add a couple of clibration stars and the scope is aligned perfectly. Always placing objects in the center of the eypiece with no need to adjust.

The mount is solid and is completely silent while tracking. This scope is perfect for astrophotgraphy. I have spent several nights taking CCD images and the scope perfectly tracks for great images. I plan on using an autoguider in the future which the mount already has a jack to support this feature.

All in all I am extremely pleased with the performance and quality of the scope/mount and look forward to several nights observing the skies with my new scope.

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Customer Q & A

1 Question About This Product
Q: "Can you tell me the weight of the tube of a Celestron CGEM 800 SCT?"
A: The weight of the C8 Optical tube on the SCT is 12.5lbs.
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