Celestron CPC 1100 GPS (XLT) 280mm f/10 Schmidt-Cassegrain GoTo Telescope

Celestron CPC 1100 GPS (XLT) 280mm f/10 Schmidt-Cassegrain GoTo Telescope

Celestron CPC 1100 GPS (XLT) 280mm f/10 Schmidt-Cassegrain GoTo Telescope

B&H # CECPC11XLT MFR # 11075-XLT
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Value: $35.00

Product Highlights

  • 280mm (11") Schmidt-Cassegrain OTA
  • 2800mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • Integrated 16-Channel GPS Receiver
  • NexStar Hand Controller
  • 40,000+ Object Database with Tours
  • Backlash Compensation and Permanent PEC
  • Dual-Tine Motorized Alt-Az Fork Mount
  • 40mm Eyepiece and 90° Star Diagonal
  • 2" Stainless Steel Tripod with Tray
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Options: OTA, Mount, Tripod

OTA, Mount, Tripod OTA, Mount, Tripod, Carrying Case

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Aperture: 280mm (11"), f/10

203mm (8"), f/10 235mm (9.25"), f/10

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280mm (11"), f/10
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Celestron CPC overview

  • 1Description

Representing the largest aperture in the series and combining light-gathering power with ease of use, the Celestron CPC 1100 GPS (XLT) 280mm f/10 Schmidt-Cassegrain GoTo Telescope provides users with a complete rig for near- and deep-space observation and astrophotography. Optically, it features a Schmidt-Cassegrain light path consisting of a corrector plate, a spherical primary mirror, and a secondary mirror. Complementing the optical system is the proprietary StarBright XLT optical coating system that improves light transmission and reflectivity across the entire visual spectrum. The combination of optical components and the StarBright XLT system produces bright and clear high-resolution images with true color rendition across the entire field of view with minimal distortion, aberrations, or off-axis comas.

The brain of the entire system is the NexStar+ computer controller. Equipped with a database of over 40,000 objects, including the planets, stars, nebulae, galaxies, and the complete Messier catalog, it can also be programmed with up to 99 custom user-defined objects and have filters added for custom object lists. Its intuitive menu-driven user interface provides the power to observe the heavens with nine slew speeds and three tracking rates, plus anti-backlash compensation and Permanent Periodic Error Correction (PPEC) for smoother movements in the motors and improved tracking over time. Features such as guided tours, extended information on 200 popular objects, and multiple alignment options make the NexStar+ controller easy to use and invaluable to new users and experienced stargazers.

The optical tube is outfitted with a standard 1.25" visual back to make it easier to find eyepieces, accessories, and imaging gear. For visual observations, a 1.25" star diagonal is included along with a 40mm Plössl eyepiece that yields 70x magnification. The motorized dual-tine fork mount has dual-axis servo motors that provide precision movements with minimal vibration and a high resolution. It also has an integrated 16-channel GPS receiver that sends information to the hand controller and requires limited input from the user. A heavy-duty stainless steel tripod helps reduce vibrations to ensure clear resolution during observation or imaging sessions.

Optical Tube
  • 280mm (11") aperture
  • f/10 focal ratio
  • 2800mm focal length
  • Schmidt-Cassegrain optical design
  • Fine-annealed Pyrex glass reduces internal light loss to improve color, clarity, and sharpness
  • StarBright XLT optical coating system
  • Internal focusing mechanism
  • Resolution: 0.5 arcsec (Rayleigh); 0.42 arcsec (Dawes)
  • Secondary mirror obstruction: 3.75" (95mm); 34% by diameter; 12% by area
StarBright XLT System
  • Maximizes light transmission through optical path
  • Improves color rendition, contrast, sharpness, resolution, and brightness
  • Broadband system provides flat wavelength transmission across the entire visual spectrum
  • Multi-layer mirror coatings with layers of aluminum, SiO2 (quartz), and TiO2 (titanium dioxide)
  • Multi-layer anti-reflective corrector plate coatings with layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide); hafnium has a wider band-pass than the commonly used titanium
  • High-transmission water white glass corrector plate limits light loss due to internal absorption
NexStar Hand Controller
  • 40,000+ object database
  • 99 user-defined programmable celestial or terrestrial objects
  • Expanded information on over 200 most popular objects including history, facts, and mythology
  • Nine slew speeds: 3°/sec, 2°/sec, 0.5°/sec, 64x, 16x, 8x, 4x, 1x, 0.5x
  • Three tracking rates: Sidereal, Solar, Lunar
  • Tracking modes: Alt-Azimuth, Equatorial North, Equatorial South
  • Multiple alignment procedures: Sky Align, Auto Two-Star, Two-Star, Solar System, EQ North, and EQ South
  • Tour Mode: System seeks out the best objects for the date and time and automatically slews to them
  • Constellation Tour: Takes the user on a tour of the best objects within a specific constellation
  • Identify Mode: Use to identify an unknown object in the field of view or to find other celestial objects that are close to where the user is viewing
  • Anti-backlash compensation: Trains out the intrinsic play between gears for more precise slewing and tracking
  • Permanent Periodic Error Correction (PPEC): System learns its internal tracking errors and improves over time for more precise tracking, requiring fewer corrections
  • Built-in instructions guide users through the alignment procedures
  • 2-line, 16-character LCD display with 19-button fiber-optic backlit LED keypad
  • RS-232 communication port
  • Flash updatable via Internet
  • Database Details:
  • Complete NGC catalog: 7840 objects
  • Complete Messier catalog: 110 objects
  • Complete IC catalog: 5386 objects
  • Complete Caldwell catalog: 109 objects
  • 2712 Abell galaxies
  • Solar system objects including the Sun, Moon, and planets
  • 20 of the most popular asterisms
  • 25 select CCD imaging objects
  • 29,500 select SAO stars, double stars, and variable stars
CPC Mount and Tripod
  • Mount:
  • Dual-tine fork; cast aluminum
  • Dual-axis DC servo motors with optical encoders to improve tracking and GoTo precision
  • R.A. and declination 5.625" aluminum worm gears; 180-tooth brass worm wheel
  • 9.8" azimuth bearing
  • Internal 16-channel GPS receiver sends date, time, location information to hand controller, requiring no input by user
  • Altitude and azimuth manual clutches allow the mount to be moved even with the power off
  • Ports: Autoguider, 2 x auxiliary, PC interface
  • Hand controller holder moves with mount to prevent cord wrap during long-duration observation or astrophotography sessions
  • 9-15 VDC power requirement
  • Tripod:
  • Adjustable height
  • 2"-diameter stainless steel legs
  • Accessory tray for holding eyepieces, filters, etc.
  • Center support bracket locks legs in place to add stability and reduce vibrations
  • Weight: 19 pounds
Included Accessories
  • Eyepiece:
  • 1.25" barrel diameter
  • Accepts most 1.25" astronomical filters
  • 40mm focal length produces 70x power
  • 34.5' field of view at 1000 yards
  • 0.65° angle of view
  • Diagonal:
  • 90° angle places head in comfortable viewing position
  • 1.25" snout and holder
  • Star configuration corrects view horizontally but not vertically
  • Finderscope:
  • Low 8x magnification ensures a wide field of view for easier alignment
  • 50mm objective allows users to see dimmer objects to have more alignment star choices
  • Includes quick release bracket
  • Power Adapter:
  • 9-15 VDC
  • Car/vehicle port plug
UPC: 050234107518
In the Box
Celestron CPC 1100 GPS (XLT) 280mm f/10 Schmidt-Cassegrain GoTo Telescope
  • 40mm Eyepiece
  • 90° Star Diagonal
  • 8x50 Finderscope with Bracket
  • Stainless Steel Tripod with Tray
  • 12 VDC Car/Vehicle Power Adapter
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    Celestron CPC specs

    Optical Design Schmidt-Cassegrain
    Aperture 280mm
    Focal Length 2800mm
    Focal Ratio f/10
    Eyepiece Barrel Diameter 1.25"
    Diagonal 90°, star
    1.25" snout and eyepiece holder
    Finderscope 8x50
    Quick release bracket
    Tripod Stainless steel
    2" diameter legs
    Adjustable-height
    Mount Type Motorized dual-tine alt-az fork mount
    Power Source 12 VDC car/vehicle power
    Optical Tube Length 23.0" / 58.4 cm
    Weight OTA: 65.0 lb / 29.5 kg
    Tripod: 19.0 lb / 8.6 kg
    Packaging Info
    Package Weight 128.6 lb
    Box Dimensions (LxWxH) 36.0 x 34.0 x 34.0"

    Celestron CPC reviews

    CPC 1100 GPS (XLT) 280mm f/10 Schmidt-Cassegrain GoTo Telescope is rated 5.0 out of 5 by 4.
    Rated 5 out of 5 by from Excellent Catadiptric Schmidt Cassegrain As an enthusiast amateur astronomer, this telescope fits the bill! I had also looked at the Meade 10 one that is similar to this, and settled on this. I got more for less money, and all reviews on the web are very positive. The focus knob moves the primary mirror very smoothly. This unit has really good optics. On a really clear night, I have picked up stuff that is a 12 magnitude. Very impressive. It has pretty accurate tracking too. I would reccomend you get the Celestron Star Sense Autoalign for this. It makes alignment a breeze. I for some reason found Celestron's star alignment process built in to be a pain. This telescope is heavy at 80+ pounds for the whole deal. Make sure you get 2 eyepeices for it. Also make sure to get a JMI case to transprot this beast! You will get a lot of oohs and awes from people at star parties!
    Date published: 2015-06-01
    Rated 5 out of 5 by from Wonderful scope Though it's no longer the flagship of the Celestron line, it's a great scope for visual observing. I bought mine a few years ago as my first scope, and it's still my main scope. Rock solid, very reliable. Very customizable -- you can hang all sorts of things on it. I've got ST80 finderscope, Telrad, counterbalance weights, ADM mounting bars, dew heaters, 2 visualback, etc on mine. It is a bit heavy to transport and assemble. The scope and all its hanger-ons and companion gear fills up most of the back of my Subaru. You'll need a good and hefty 12V batterypack to run the scope and dew heaters. Celestron sells something that'll do for a starter. But like most folks, i eventually assembled my own deep-cycle batterypack after a couple years. You'll also need a big case. There's basically two options -- the expensive JMI case, or else the much cheaper big Stanley/Husky rolling toolbox (often found at HomeDepot and such). The Stanley case usually requires some customization, but is more practical i think -- easier to get the scope in/out of it, and it also serves double-duty as a usable observing table. And then don't forget the eyepieces. For a good scope, you also want good eyepieces. You might eventually end up spending nearly as much for eyepieces as you do for the scope. I myself use 41mm Panoptic, 27mm Panoptic, 17mm Delos, 12mm Delos, and 8mm Delos. But there's also cheaper solutions that work well.
    Date published: 2015-10-24
    Rated 5 out of 5 by from Wonderful instrument This is my fourth telescope, so I know a little about what makes them good or disappointing. The CPC 1100 is a fine optical instrument on an excellent mount. I have the advantage of clear, dry air in Arizona for viewing, and this unit delivers images on moon, planets, and deep-sky objects that are substantially superior to those of my 8 Schmidt-Cassegrain. I am 66 years old, so I was a bit concerned about whether I could handle a unit this size when I travel to remote viewing sites away from city lights, but this is working OK. The telescope/fork mount combination weighs 65 lbs, so it's a bit of a load, but it has two nice gripping points, and I find that I can carry it short distances and move it in and out of my car without major problems. I set it on the passenger seat and buckle it in with my seatbelt, so it rides well as I travel. My only minor criticism of the unit is that the three screws on the underside of the tripod head that are supposed to lock the fork mount in position atop the tripod are hard to thread. I can always get one or two of these to screw in, but it's difficult to get all three. Most of the times I've used it, I finally just settled for screwing in one or two and hoping that's good enough. I've never had the two units come apart in use, and this doesn't hamper proper alignment or tracking at all. Nevertheless, it's a bit disquieting to be walking around the telescope in the dark thinking that it's only partially locked in place. Aside from the optical quality, the computer/GPS unit is the best feature of this scope. Leveling the tripod and aligning with three stars (which don't need to be identified, any star of unknown name brighter than mag. 2.5 works) is easy and fast. This unit's alignment is very user friendly. You can plow through 50 or even 100 objects in a reasonable length viewing session. It's a fine instrument value for the price. I recommend it highly.
    Date published: 2017-02-01
    Rated 5 out of 5 by from bright image good bright image, little heavy for a telephoto lens but can be used.
    Date published: 2018-01-20
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