Celestron Facebook Page
Celestron Twitter Feed
Celestron YouTube Channel
Celestron Flickr Channel
Celestron Blog RSS Feed
Celestron Blog
2-year Telescope Warranty

CGEM - 1100 Computerized Telescope

Item # 11099

Be the first to review this product

CGEM Series Computerized Telescopes

Availability: In stock

$3,399.00
OR
Share this:
Aperture
280
mm
Focal Length
2800
mm
Highest Useful Magnification
661
x

Quick Overview

General Features

  • 11" Schmidt-Cassegrain telescope
  • CGEM Computerized Equatorial Mount
  • Schmidt-Cassegrain mechanism that moves the primary mirror to adjust focus is supported by two pre-loaded ball bearings, minimizing the "mirror flop" typical of bushing focus mechanisms
  • Celestron's premium StarBright XLT coatings
  • 9x50 finderscope to help accurately find objects
  • Ultra sturdy 2" steel tripod with Accessory Tray
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky

Computerized Mount Features

  • 40,000 object database with over 100 user-definable objects and expanded information on over 200 objects
  • Proven NexStar computer control technology
  • Redesigned electronics deliver constant regulated power to the motors making them capable of driving the telescope even when not perfectly balanced
  • New "All-star" Polar alignment uses any bright star for a quick and accurate Polar alignment
  • Software Features include: Mount Calibration, Database Filter Limits, Hibernate, five Alignment Procedures
  • Flash upgradeable hand control software and motor control units for downloading product updates over the Internet
  • Meridian preference for slewing - allows you to approach an object from the side of the Meridian that maximizes tracking (and imaging) time
  • Solar System alignment method - allows you to align your telescope and view the moon and planets during the day
  • Custom Rate 9 feature allows you set maximum slew rate
  • Tandem mode allows you to star align the mount even when positioned for tandem scope use
  • Custom database lists of all the most famous deep-sky objects by name and catalog number: the most beautiful double, triple and quadruple stars; variable stars; solar system objects and asterisms
  • Permanent Programmable Periodic Error Correction (PEC) - corrects for periodic tracking errors inherent to all worm drives
  • Drive Motors - Low Cog DC Servo motor with integrated optical encoders offer smooth, quiet operation and long life. The motor armatures are skewed to minimize cogging which is required for low speed tracking
  • Internal Cable wiring for trouble-free setup and transportation
  • Designated six-pin RJ-12 modular jack, ST-4 compatible guide port
  • Autoguide port and Auxiliary ports located on the electronic plate for long exposure astrophotography
  • Double-line, 16-character Liquid Crystal Display Hand Control with backlit LED buttons for easy operation of goto features
  • RS-232 communication port on hand to control the telescope via a personal computer
  • Secure power plug ensures that the mount's power source is not accidentally disconnected
  • Includes NexRemote telescope control software, for advanced control of your telescope via computer
  • GPS compatible with optional SkySync GPS Accessory
  • Precision machined 40 mm diameter steel Polar shafts supported by multiple tapered roller bearings and ball bearings

CGEM - 1100 Computerized Telescope

Multimedia Gallery

  • CGEM Series Tour

Awards

Hot Product 2010

Key Technologies

All-Star Polar Alignment
 Flash Upgradeable
 NexRemote
 StarBright XLT

Details

Celestron's CGEM-1100 features our high-end 11" Schmidt Cassegrian OTA with XLT coatings mounted on our brand new CGEM™ mount.

The CGEM™ mount 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. 

Ergonomic Design - CGEM 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 series has a new 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, 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 will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky.  The CGEM 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 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.

Additional Information

Optical Design Schmidt-Cassegrain
Aperture (mm) 280 mm (11 in)
Focal Length (mm) 2800 mm (110 in)
Focal Ratio 10
Eyepiece 1 (mm) 40 mm (1.57 in)
Magnification 1 70 x
Finderscope 9x50
Star Diagonal 1.25
Mount Computerized Equatorial
Optical Tube Aluminum
Tripod Adjustable, Stainless Steel
Power Supply Car battery adapter
Highest Useful Magnification 661 x
Lowest Useful Magnification 40 x
Limiting Stellar Magnitude 14.7
Resolution (Rayleigh) 0.5 arc seconds
Resolution (Dawes) 0.41 arc seconds
Light Gathering Power (Compared to human eye) 1600 x
Angular Field of View (deg) 0.71 °
Secondary Mirror Obstruction 3.75 in (95 mm)
Secondary Mirror Obstruction by Diameter 34 %
Secondary Mirror Obstruction by Area 12 %
Optical Coatings Starbright XLT Coatings
Optical Tube Length 24 in (610 mm)
Telescope Weight 120 lbs (54 kg)
Counterweights 2 x 17 lbs
Motor Drive Low cog DC Servo motors with encoders, both axes
Slew Speeds Nine slew speeds: 5 °/sec, 2 °/sec, 1 °/sec, 64x, 16x, 8x, 4x, 1x, .5x
Tracking Rates Sidereal, Solar and Lunar
Tracking Modes EQ North and EQ South
Alignment Procedures 2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar System Align
Software Precision 24 bit, 0.08 calculation
Gear Steel worm gear and 90 mm pitch diameter brass worm wheel
Computer Hand Control Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons
Database 40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects
Power Requirements 12 VDC 3.2 Amps
GPS Optional SkySync GPS Accessory
Eyepiece 1 Field of View (deg) .71 °

Related Products

Check items to add to the cart or select all

Knowledge Base

  1. What size of scope is best for different kinds of objects?
  2. Aperture
  3. Focal length
  4. Contrast
  5. Light gathering power and magnitude limit
  6. Telescope-Astronomy Resources on the Web
  7. What does magnitude mean?
  8. Exit pupil
  9. What are diffraction-limited optics?
  10. What is the focal ratio? How is it related to the f-stop?
  11. Near focus
  12. Field of view
  13. Magnification or power
  14. Resolution - resolving power
  15. Optical design aberrations
  16. How do I align the SCT's corrector plate and secondary?
  17. Why don't the images I see through my telescope look the same as photos I see taken with the same type of telescope?
  18. How far can I see with a telescope?
  19. How do you determine a telescope's magnification?
  20. Rough polar alignment
  21. Why do I need polar alignment?
  22. Accurate polar alignment
  23. Precise polar alignment
  24. Polar alignment for the southern hemisphere
  25. I upgraded-reflashed my hand control and now I'm not getting the control functions for my mount, but for another mount. What happened? How can this be fixed?
  26. My CGEM mount won't let the front latitude screw lock the mount. What's wrong - is the mount unstable?
  27. I downloaded the PECTool software from the Celestron website to my Windows Vista 32 PC. When I tried tio install it, 'ERROR: NexRemote not allowed to run on WinNTX' was displayed. How do I get it to run?
  28. I hibernated my GOTO mount. When I powered back up and woke up the scope, it did not point as accurately as before. What gives?
  29. I'm using a focal reducer and can't seem to focus my SLR camera on my Schmidt-Cassegrain telescope (SCT). What am I doing wrong?
  30. What is vignetting?
  31. I'm doing photography with an eyepiece, using my camera with and without a lens. What are the f-numbers of my setup for the afocal and eyepiece projection methods?
  32. Which screws are safe to remove for mounting an accessory finderscope on my Celestron Schmidt-Cassegrain telescope (SCT)?
  33. What are the pros and cons of adding aftermarket collimating screws to my Schmidt-Cassegrain telescope (SCT)?
  34. Can my NexStar hand control be repaired instead of replaced?
  35. What is back focus? What problems does it cause for visual and photographic use of my scope? What are related focus issues?
  36. I need to box up my scope and ship it. What's the best way to pack it?
  37. Why won't my image erecting eyepiece or image erecting diagonal always give right side up images with my scope?
  38. My image shifts when I'm focusing my Schmidt-Cassegrain telescope (SCT) and after I get a great focus, the focus will change. What is happening?
  39. What is field rotation? How does it affect my scope's viewing and imaging?
  40. Why do I need to guide my telescope for photography? Don't accurate alignment and firmware functions like periodic error correction (PEC) take care of it all?
  41. My GPS-equipped scope is showing the wrong time information. How do I correct this?
  42. What is a star party? Where do I find information on star parties in and around my area?
  43. I "accidentally" took apart my eyepiece, removing the lens that goes closest to my eye. Help! How do I put it back together?
  44. I am using a SkyScout Connect with my Celestron GOTO telescope. Do I still need to align my scope?
  45. I am using a GPS with my Celestron GOTO telescope. Do I still need to bother with SkyAlign?
  46. I'm looking at my Celestron scope and it has a serial number on it. Can you tell me the model, type and year it was made?
  47. I want to use the focal reducer/corrector with an aftermarket eyepiece holder. What is the best spacing, focal length, etc?
  48. Why am I getting "This mount does not support the PECTool" when using my CGE, CPC, CGEM and CGE Pro mounts?
  49. Why am I getting "Found Difference at Address 301: Value of 3589 should be 3590" when ugrading my CGEM motor control firmware? Is this serious?
  50. What are the specifications for an AC adapter that will work with Celestron's
  51. What is LST? Where do I find it in my GOTO scope's menu?
  52. When I use IDENTIFY with my GOTO scope, what is it showing me?
  53. My CGEM mount is moving in the wrong direction when I use the direction arrows. What is wrong? How can I change the direction of the direction buttons?
  54. Is there any way to run Celestron's window-based drivers and software on Macs?
  55. My images with a CCD camera are showing black or white streaks on the brighter stars. They are all bloomed out. What's wrong with my scope?
  56. Where can I download the unified ASCOM drivers for Celestron?
  57. What is the operating temperature range for Celestron's telescopes?
  58. My NexStar hand control displays "Offset Too Large" when I'm trying to change my scope's alignment. What does this mean? How to I fix the issue?
  59. How much will the addition of a focal reducer increase my scope's field of view?
  60. My Celestron software won't run on my Windows 7 computer. Help!
  61. I need information on the RS-232 (serial) commands for NexStar controlled telescopes.
  62. I have two scopes I want to use side-by-side or tandem with my Celestron CGE - CGE Pro - CGEM - Advanced GT mount. Can I do that?
  63. How do I balance my CGEM-mount optical tube assembly (OTA) in declination?
  64. Can I change the position of my CGEM equatorial head on the tripod?
  65. I have a CGEM mount and I need to use it at latitudes below 15 degrees or above 70 degrees. Can I do that?
  66. How do I use a third party periodic error correction (PEC) program like PEMPro with my Celestron mount?
  67. How do I use the polar axis finderscope for the CGEM mount?
  68. What are the instructions for getting my CN-16 or SkySync GPS working with my Celestron GOTO mount?
  69. I want to permanently pier-mount my CGEM. What size is the hole on the head holding the central rod?
  70. My CGEM has wires dangling in the polar axis shaft. Will these interefere with the insertion and use of the polar axis finderscope #94224?
  71. When should I use the CALIBRATE MOUNT utility? What does it do?
  72. I have a Celestron GOTO scope, a Mac and an autoguider. I want to autoguide with the scope. Is your autoguider port Mac-compatible?
  73. How do you stop a GOTO slew in progress? Is there a better way than turning off power or pulling the power plug?
  74. The autoguiding port diagram in my manual is different than the diagram for the NexGuide connection. Are these differences important?
  75. What's a quick summary of All-Star polar alignment with CGEM - CGEM DX, CGE, CGE Pro and Advanced GT Series mounts?
  76. What is the threading on the outside of my Celestron GOTO mount's power jack?
  77. What is the size of the threading holding the visual back to my Schmidt-Cassegrain telescope? Is it the same for all Celestron SCTs?
  78. How do I remove the optics from the optical tube assembly (OTA) of my Schmidt-Cassegrain telescope (SCT)?
  79. How do I remove the optics from the optical tube assembly (OTA) of my Schmidt-Cassegrain telescope (SCT)?
  80. The standard visual back on my Schmidt-Cassegrain telescope (SCT) has threads on the outside of the barrel. What are these threads for?
  81. How do I program my flash upgradeable hand control? What about motor control upgrades?
  82. Miscellaneous Specifications for the CGEM - CGEM DX Mount
  83. My Celestron mount is making a high pitched whine or hum even when it's not moving. Is this a problem?
  84. The hand control of my new scope shows the message “Bootloader invalid package 0080” or “Bootloader invalid package 0002”. How can I fix this and make the mount work?
  85. What is the screw size of the adjusting screws for the polar finderscope #94224 for the Advanced GT and CGEM – CGEM DX mount?
  86. What are the differences between the CGEM and CGEM DX mounts?
  87. What battery type is used in the CGEM and CGEM DX mounts for the real-time clock (RTC)?
  88. I’m experiencing motion in RA east after slews with my Celestron German GOTO mount. Is this backlash and how do I correct it?
  89. Will the 94224 Polar Finder work with the CGEM and the CGEM DX mounts?
  90. How do I replace the real-time clock (RTC) battery in my CGEM/CGEM DX mount?
  91. My CGEM – CGEM DX mount is missing the polar axis index sticker. How do I position a replacement sticker?
  92. What screws are used for the C11 optical tube assembly (OTA)?
  93. I'm using an 11” Schmidt-Cassegrain tube (SCT) on my CGEM mount and the scope won't balance in RA. What can be done about this?

Downloads

Manuals

Product Info Sheets

Reference Materials

Software

2-year Telescope Warranty

CELESTRON TWO YEAR LIMITED WARRANTY

A. Celestron warrants your telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase satisfactory to Celestron.

B. The Proper Return Authorization Number must be obtained from Celestron in advance of return. Call Celestron at (310) 328-9560 to receive the number to be displayed on the outside of your shipping container.

All returns must be accompanied by a written statement setting forth the name, address, and daytime telephone number of the owner, together with a brief description of any claimed defects. Parts or product for which replacement is made shall become the property of Celestron.

The customer shall be responsible for all costs of transportation and insurance, both to and from the factory of Celestron, and shall be required to prepay such costs.

Celestron shall use reasonable efforts to repair or replace any telescope covered by this warranty within thirty days of receipt. In the event repair or replacement shall require more than thirty days, Celestron shall notify the customer accordingly. Celestron reserves the right to replace any product which has been discontinued from its product line with a new product of comparable value and function.

This warranty shall be void and of no force of effect in the event a covered product has been modified in design or function, or subjected to abuse, misuse, mishandling or unauthorized repair. Further, product malfunction or deterioration due to normal wear is not covered by this warranty.

CELESTRON DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE, EXCEPT AS EXPRESSLY SET FORTH HEREIN. THE SOLE OBLIGATION OF CELESTRON UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT, IN ACCORDANCE WITH THE TERMS SET FORTH HEREIN. CELESTRON EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO USE ANY CELESTRON PRODUCT. ANY WARRANTIES WHICH ARE IMPLIED AND WHICH CANNOT BE DISCLAIMED SHALL BE LIMITED IN DURATION TO A TERM OF TWO YEARS FROM THE DATE OF ORIGINAL RETAIL PURCHASE.

Some states do not allow the exclusion or limitation of incidental or consequential damages or limitation on how long an implied warranty lasts, so the above limitations and exclusions may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Celestron reserves the right to modify or discontinue, without prior notice to you, any model or style telescope.

If warranty problems arise, or if you need assistance in using your telescope contact:

Celestron
Customer Service Department
2835 Columbia Street
Torrance, CA 90503
Tel. (310) 328-9560
Fax. (310) 212-5835

Monday-Friday 8AM-4PM PST

NOTE: This warranty is valid to U.S.A. and Canadian customers who have purchased this product from an authorized Celestron dealer in the U.S.A. or Canada. Warranty outside the U.S.A. and Canada is valid only to customers who purchased from a Celestron's International Distributor or Authorized Celestron Dealer in the specific country. Please contact them for any warranty service.

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

Where To Buy

Premier Select dealers offer an extensive selection of Celestron products in stock for immediate delivery while providing a high level of product knowledge and customer service.
  Celestron USA Dealers US Premier Select Dealers  
     
  Celestron Canadian Dealers Canadian Premier Select Dealers  
     
Premier Plus dealers offer a range of Celestron products, many in stock for immediate delivery, while providing a high level of product knowledge and customer service.
  Celestron USA Dealers US Premier Plus Dealers  
     
  Celestron Canadian Dealers Canadian Premier Plus Dealers  
     
For a complete list of Celestron dealers, please visit our Dealer Locater
An award-winning legacy brand for over 50 years, Celestron has grown to become the world’s leading telescope maker, and enjoys brand-name recognition among serious amateur astronomers for superior optics, outstanding design, and innovative technology. Celestron also develops a wide range of exciting products and technologies that enhance the science, outdoor and educational markets. At Celestron, we strive to inspire a sense of wonder, knowledge and fun in our customers and throughout our company.

© 2013 Celestron, LLC. All Rights Reserved.
Website content is subject to change without notice

ALL CELESTRON PRODUCTS ARE DESIGNED AND INTENDED FOR THOSE 14 YEARS OF AGE AND OLDER.

Site designed and hosted by: GammaFX, Inc. Design Studio

Activities

Network Sites

Links



Other Celestron Sites