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Celestron C11-SGT (XLT) Advanced Series

The Celestron C11-SGT (XLT)represents the largest aperture in the Advanced Series telescopes. This is the most cost effective way to purchase an eleven-inch Schmidt-Cassegrain telescope.

Item #ProductStock StatusPriceShipping
11067-XLTCelestron C11-SGT (XLT)
Normally Ships in 7-10 Days
$2,099.00Get Shipping Quote
Celestron C11-SGT (XLT) Advanced Series Telescope

Introducing the Celestron C11-SGT (XLT) Advanced Series

The largest computerized scope in the Celestron Advanced Series, the C11-SGT (#11067) comes mounted on the CG-5 GT computerized EQ mount and allows access to features like automatic star alignment capability and GoTo slewing to over 40,000 objects. Equipped with high speed motors and hand control, the C11-SGT allows you to remotely slew your telescope to desired objects quickly and accurately. No matter at what level you are starting out, this precision instrument will satisfy your needs.

CG-5 Mount — Precision engineered for stability.

Our new German Equatorial mount has precision worm gears on both axes for extremely smooth tracking motion. The key element that makes this system the most stable in its class is the NEW heavy-duty tripod with larger and more substantial legs that offer excellent damping characteristics for more stable views. The CG-5 also has a convenient latitude scale for easier alignment and an optional polar finder scope for the ultimate in precision alignments.

Celestron Advanced Series telescopes include these high performance features:

  • Celestron's StarBright® XLT optical coatings
  • Proven NexStar® computer control technology
  • RS-232 communication port on hand control to control the telescope via a personal computer
  • 40,000+ object database with 400 user-definable objects and expanded information on over 200 objects
  • 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 star; solar systems; objects and asterisms
  • Double line, 16-character Liquid Crystal Display Hand Control with 19 backlit LED buttons
  • DC Servo motors with encoders on both axes
  • The CG-5 GT computerized mount features Celestron's sleek integrated design

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Optical Specifications: Celestron C11-SGT (XLT) Advanced Series
Type Schmidt-Cassegrain
Aperture (mm) 279.4 mm
Aperture (in.) 11 inches
Focal Length 2800 mm
Focal Ratio f/10
Magnification (w/supplied eyepiece) 70X
Limiting Visual Stellar Magnitude <p><b>Limiting Stellar Magnitude</b><br /> This is a measure of the faintest star that can be seen with a telescope under ideal conditions. We include this figure for the purpose of comparing two telescopes of different apertures using a consistent scale. Many manufactures publish this specification. Unfortunately manufactures use different methods to calculate this figure, rendering the numbers useless for direct head to head comparison of different brands of telescopes. </p> <p>Limiting stellar magnitude is the sum of the naked eye limiting magnitude and the telescopic gain. The naked eye limiting magnitude varies by location due to local light pollution; therefore, it is an assumption. This figure could be 6.5 or higher at some of the darkest locations, but less than 2 in the middle of a large city. Our calculations assume a figure of 5, which one might typically find 30-40 miles from a major urban area. </p> <p>Telescopic gain is a direct function of aperture. No attempt has been made to compensate for the affects of central obstructions or different types of optical coatings.</p> 14.8 Magnitude
Accessories and Features
Included Eyepiece(s) 40mm Plossl
Finder 6x30 Optical
Go-To System Celestron NexStar system with 40,000+ object library. Flash upgradeable via the Internet.
Star Diagonal 1.25-inch prism type
Accepts 2" Eyepieces <p><b>Telescope Eyepiece Formats</b><br /> Virtually all telescope eyepieces available today conform to one of two barrel diameter standards: 1.25 or 2 inches. Most amateur astronomers will be perfectly content with 1.25" eyepieces. Two-inch eyepieces have only one inherent advantage. That advantage is a potentially larger field of view, but not every telescope can take advantage of that potential. </p> <p>A Telescope and eyepiece work together to collect parallel light rays over a large area, compress those light rays down into a smaller area, and the re-orient them so that they are nearly parallel once again. Essentially light arriving at a telescope with any given aperture is compressed into a smaller aperture or exit pupil. The ratio of the telescope aperture to eyepiece exit pupil determines the magnification.</p> <p>There are cases at very low magnifications where the eyepiece barrel diameter becomes the constraint on maximum field of view. The eyepiece barrel itself actually blocks some of the available light that the telescope is collecting, thus limiting the field of view. Two-inch eyepieces overcome this constrain by allowing a larger light cone to enter the eyepiece. We must conclude this discussion by restating that 2" eyepieces have no inherent advantage over 1.25" eyepieces other than the potential for a larger field of view when used with a telescope capable of benefiting from that advantage. </p> No
Adaptable for 2" Eyepieces <p><b>Two-inch Eyepiece Upgrade</b><br /> Some telescopes that are factory configured for 1.25" eyepieces can be upgraded to accommodate 2" eyepieces. Other telescopes are designed to handle only 1.25" eyepieces and cannot be upgraded due to their focuser size or other constraints. </p> <p>Sometimes this upgrade is possible but not recommended. This could be due to clearance issues caused by the addition of a larger 2" star diagonal,which in some cases will bottom out on the base of a fork mounted go-to telescope. This is potentially damaging the drive mechanism. In other cases the light cone exiting the telescope may not be large enough to derive any benefit from a 2" eyepiece.</p> Yes
Physical Parameters
Weight, Optical Tube 27.5 Pounds
Weight, Fully Assembled 91 Pounds
Counterweights 3x11 Pounds
Optical Tube Length 24 Inches
Power Requirements 2.5 Amps @12VDC
Power Supply Car battery adapter included
Eyepiece Calculator
Enter your eyepiece's specifications:
Focal Length (mm):
Apparent Field (deg.):
 
Magnification:
 
True Field:
 
Exit Pupil: <p>Exit pupil represents the diameter of the column of light exiting the eyepiece. Magnification is simply the ratio of telescope aperture to exit pupil. Fox example, using a telescope with 100mm aperture and an exit pupil of 2mm yields a magnification of 50X.</p> <p>There are both upper and lower limits to the useful range of exit pupils. The typical human eye pupil dilates to a maximum of 7mm when fully dark adapted. This figure decreases with age. Using an exit pupil that is larger than this upper limit simply spills the light onto an area of the eye not capable of receiving data. At the opposite end of the range, a smaller exit pupil means less area on the eye is collecting data. Images brightness decreases with decreasing exit pupil. Deep space objects grow dimmer rapidly as the exit pupil falls below 1 mm. The planets also start to become noticeably dimmer when the exit pupil falls much below 0.5 mm.</p> <p>Our eyepiece calculator provides warnings and error messages based upon the value of the exit pupil. These are intended to be guidelines as opposed to hard rules. There is no harm in violating these gidelines, but your enjoyment of the telescope may be diminished if you do. </p>
 
 
Recommended Accessories: Celestron C11-SGT (XLT) Advanced Series
Item #NameDescriptionPrice 
18777Celestron 17 AH Power TankTake your telescope anywhere with this portable rechargeable power supply. The Power Tank 17 is also useful as an emergency roadside accessory.$109.95
AZ 812Flexi-Heat for 11" Schmidt-CassegrainAstrozap Flexi-Heat Dew Shields combine the benefits of a dew shield and dew heater in one integrated package. They direct the heat right to your optical tube assembly, thus eliminating any chance of dew formation. Guaranteed!$125.00
DDHCDigital Dew Heater ControllerDigital Dew Heater Control Unit.Each heater output is controlled independently and has a full range of adjustment from 0-100%. This eliminates the problem of overheating or not reaching desired temperature regardless of heater size and combination.$109.00
C11metKnobs for 11" f/10 SCT (CPC) Metric ThreadCollimate your Schmidt-Cassegrain without tools. Its easy, just grab a Bob's Knob and turn. You can even do it while looking through the eyepiece on most scopes. $20.95