Celestron CGEM II 800, 8" Schmidt-Cassegrain Telescope

SKU: CNCGEM800HD

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Reviews about this item

Review Summary

2021-07-01T08:57:29

Rated 5 out of 5

Very impressive telescope, good value, good service.

Adorama's service was excellent. They shipped it within a few days of ordering and it was received in good shape. The telescope is well designed and well made. I have been amazed at what this scope can do and I have been able to view and photograph deep sky nebulae and galaxies I have never been able to capture before. The tripod and equatorial mount are a bit heavy but very manageable when separately handled. It helps to have some basic knowledge of astronomy and telescopes to get the most out of this telescope as there is a learning curve. I would recommend this telescope for anyone who has a 'starter scope' and wishes to upgrade.

DONALD M.

2020-02-20T06:36:33

Rated 5 out of 5

Great Piece of Equipment

Well built piece of equipment. Looks exactly like in the picture. Upgrades available for the firmware (See Celestron website). The combined weight of this equipment is HEAVY!

Michael P.

2017-10-10T10:58:32

Rated 5 out of 5

great service

Your service is very very good.

AARON R.

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Celestron CGEM II Telescope Specifications

  • 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

  • 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

    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 Coating

  • Optical Tube Length

    17 in (432 mm)

  • Optical Tube Weight

    12.5 lbs (5.67 kg)

  • Dovetail Compatibility

    CGE / CGX Mount

  • Mount Type

    Computerized Equatorial

  • Tripod

    2" Steel tripod with graduated markings on lower section

  • Dovetail Mount

    Directly connects to both CG-5 & CGE dovetail bars

  • Payload capacity

    40 lbs.

  • Latitude Adjustment Range

    15 to 70 Degree

  • Power Requirements

    12 VDC, 3.2 amps

  • Ports

    1x Hand control port, 1x Auxiliary Port, 1x Auto guider port, 1 USB 2.0 port (on hand control)

  • Motor Drive

    Low cog DC servo motors

  • Slew Speed

    9 Slew Speeds

  • Tracking Rates

    Sidereal, Solar and Lunar

  • Tracking Modes

    EQ North and EQ South

  • Alignment Procedures

    AutoAlign, 2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar System Align

  • Computerized Hand Control

    Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons, USB 2.0 port for PC c onnection

  • Database

    Database 40,000+ objects, 100 user defined programmable objects. En hanced information on over 200 objects

  • Mount Weight

    40 pounds

  • Tripod Weight

    20 pounds

  • Weight of Counterweight

    17 Pounds

  • Total Weight of Mount Kit

    77 Pounds

4 Accessories for Celestron CGEM II 800, 8" Schmidt-Cassegrain Telescope

  • All Accessories (4)
  • Batteries & Power Supply (4)

About Celestron CGEM II Telescope

The CGEM II 800 Schmidt-Cassegrain Telescope features Celestron's premium StarBright XLT coated optics and the newly redesigned CGEM II computerized equatorial mount. It is the most lightweight and portable of the three size models. This telescope is especially at home as a solid platform for long exposure photography with optional CCD cameras or photographic equipment. At 8 inches of aperture with our premium StarBright XLT coatings, the CGEM II 800 gives you over 800 times the light gathering power than the unaided eye.

A fresh update to the venerable CGEM mount, the CGEM II has a fresh, attractive, bold appearance and is capable of carrying Celestron's higher-end SCT optical tubes (up to 11") securely and vibration free, which is ideal for both imaging and visual observing. Capable of holding 40 lbs. of payload and slewing at 5° per second, you will be able to instantly point to any of the celestial objects in the database.

ERGONOMIC DESIGN
CGEM II was designed to be ergonomically friendly with large Altitude and Azimuth adjustment knobs for quick and easy polar alignment adjustment. The internal RA and DEC motor wiring provides a clean look and an easy and trouble free set up.

INNOVATION
The CGEM II series features Celestron's innovative Polar alignment procedure called All-Star. All-Star allows users to choose any bright star, while the software calculates and assists with polar alignment. Another great feature of the CGEM II sure to please astroimagers, is the Permanent Periodic Error Correction (PEC) which will allow users to train out the worm gears periodic errors, while the mount retains the PEC recordings.

PERFORMANCE
For objects near the Meridian (imaginary line passing from North to South), the CGEM II will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky. The CGEM II mount has a robust database with over 40,000 objects, 100 user defined programmable objects and enhanced information on over 200 objects. Celestron's CGEM II mount is the perfect fit between the Advanced Series and CGE Series. Offering the portability of the Advanced Series and the precision of the CGE.

COMPUTERIZED MOUNT FEATURES
• 40 lbs payload capacity
• Dual-fit Vixen/CG-5 and Losmandy/CGE dovetail saddle
• 2" steel legs with height index marks for quick leveling
• USB 2.0 port on hand control for direct links to a PC via ASCOM supported software.
• 40,000 object database with over 100 user-definable objects and expanded information on over 200 objects
• Internal cabling throughout for worry-free remote operation
• Low cog DC Servo motor with integrated optical encoders offer smooth, quiet operation
• Able to track past the meridian allowing seamless imaging
• Permanent periodic error corrections allow users to train out the worm gears periodic errors once, while the mount retains the PEC recordings.
• Software Features include: Mount Calibration, Database Filter Limits, Hibernate, five Alignment Procedures, and user-defined slew limits
• Built-in polar alignment program to polar align on any star in the sky
• Longer clutch levers to make tightening and loosening of clutches easier
• Custom database lists of all the most famous deep-sky objects by name and catalog number
• Solar System alignment method allows to view the moon and planets during the day
• Permanent Programmable Periodic Error Correction (PEC) corrects periodic tracking errors inherent to all worm drives
• Custom Rate 9 feature allows to set maximum slew rate
• Tandem mode allows to star align the mount even when positioned for tandem scope use
• USB hand control to control the telescope via a personal computer
• Includes NexRemote telescope control software, for advanced control of telescope via computer
• Precision machined 40 mm diameter steel Polar shafts supported by multiple tapered roller bearings and ball bearings
• GPS-compatible with optional SkySync GPS Accessory

Celestron CGEM II Telescope Features

  • 8" Schmidt-Cassegrain optical tube assembly
  • Celestron's premium StarBright XLT coatings
  • 2032 mm focal length (f/10)
  • 6x30 finderscope to help accurately center alignment objects
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • Includes large CGE style dovetail mounting bar

Key Features

  • Adorama Valuable Bundle. Kit Includes
  • Celestron CGEM 800, 8" Schmidt-Cassegrain Telescope

What's in the box:

  • 25mm 1.25" Eyepiece
  • 6x30mm Finderscope
  • Finderscope Bracket
  • Visual Back (1.25")
  • 1.25" 90-Degree Mirror Diagonal
  • Dovetail Slide Bar
  • Lens Caps
  • CGEM Motorized Equatorial Telescope Mount with Tripod
  • NexStar Hand Controller
  • Counterweight Shaft
  • 17 lb Counterweight
  • Tripod
  • 2-Year USA Warranty