Celestron CGEM II 800 203mm f/10 Schmidt-Cassegrain GoTo Telescope

Celestron CGEM II 800 203mm f/10 Schmidt-Cassegrain GoTo Telescope

Celestron CGEM II 800 203mm f/10 Schmidt-Cassegrain GoTo Telescope

B&H # CECGEMII800T MFR # 12010
In Stock
Order in the next 0:00:00 to ship today

Includes Free

Value: $35.00

Product Highlights

  • 203mm Schmidt-Cassegrain OTA
  • 2032mm Focal Length, f/10 Focal Ratio
  • CGEM II Motorized Equatorial Mount
  • NexStar+ Computer Controller
  • Database of 40,000+ Objects
  • Multiple Assisted Alignment Procedures
  • Guided Tours and Custom Object Filters
  • Backlash Compensation and PPEC
  • 1.25" 25mm Eyepiece and 90° Diagonal
  • 2" Adjustable Stainless Steel Tripod
Show moreShow less

Price: $2,349.00

Instant Savings: $230.00

$0.00 Tax Collected Outside NY and NJ

You Pay:  $2,119.00

Add to Wish List Item in Wish List

Celestron CGEM II 800 overview

  • 1Description

With a large aperture and a long effective focal length despite its short physical length, combined with a sturdy and precise mount, the Celestron CGEM II 800 203mm f/10 Schmidt-Cassegrain GoTo Telescope is an ideal rig for both celestial observation and astrophotography. It comes with the Schmidt-Cassegrain telescope (SCT) optical tube, a solid motorized equatorial mount, the venerable NexStar+ computer hand controller, an eyepiece, and a 90° star diagonal. Whether you're conducting planetary or deep-space viewing or imaging, the CGEM II 800 provides the performance and portability you need.

  • C8-A-XLT CGE 8" f/10 Schmidt-Cassegrain Telescope (OTA Only)

    Striking a comfortable balance between power and portability, the Celestron C8-A-XLT CGE 8" f/10 Schmidt-Cassegrain Telescope is an ideal choice for observing objects within or beyond our solar system. It features a Schmidt-Cassegrain optical system consisting of a corrector plate, a spherical primary mirror, and a secondary mirror that work together to reduce spherical and chromatic aberrations. These corrections result in crisp and clear high-resolution images with accurate color representation, without distortion—especially at the edges. Complementing the optical system is the proprietary StarBright XLT optical coating system, which improves light transmission and reflectivity across the entire visual spectrum.

    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 25mm eyepiece that yields 81x magnification. The C8-A-XLT is offered here without a mount or tripod for users who already have a reliable support system and are looking to upgrade or add to their existing gear, but comes with a larger CGE dovetail plate that is compatible with Losmandy-style saddles.

    Optical Tube
    • 8" (203mm) aperture
    • f/10 focal ratio
    • 2032mm effective focal length
    • Schmidt-Cassegrain catadioptric optical design
    • StarBright XLT optical coatings
    • Resolution: 0.69 arcsec (Rayleigh); 0.57 arcsec (Dawes)
    • Secondary mirror obstruction: 2.5" (69mm); 31% by diameter; 9.77% 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
    Mounting
    • optical tube assembly (OTA) only; mount and tripod required for proper use
    • CGE (Losmandy-style) dovetail plate for compatible saddles
    • OTA weight: 12.5 pounds
    Included Accessories
    • Visual back:
    • Standard Schmidt-Cassegrain telescope threads
    • 1.25" eyepiece/accessory holder
    • Use for prime focus or projection astrophotography with optional adapters
    • Eyepiece:
    • 1.25"-diameter barrel
    • Accepts most 1.25" eyepiece filters
    • 25mm focal length yields 81x power
    • Diagonal:
    • 90° angle puts head in comfortable viewing position
    • Threaded for direct connection to OTA without the need for the visual back
    • 1.25" snout and eyepiece/accessory holder
    • Star diagonal corrects image horizontally, but not vertically
    • Finderscope:
    • Low 6x magnification preserves wide field of view to more easily find alignment or guide stars
    • 30mm aperture helps to see dimmer objects and stars for easier alignment and star-hopping navigation
    UPC: 050234102490
  • CGEM II GoTo EQ Mount with Tripod

    Celestron updates their venerable and versatile mid-level mount with the CGEM II GoTo EQ Mount. Engineered to carry a 40-pound payload and high-torque dual DC servo motors, it is able to smoothly and accurately slew and track heavier optical tube assemblies (OTAs) and rigs up to an 11" Schmidt-Cassegrain. Its Vixen/Losmandy dual dovetail saddle makes the mount compatible with most plates used today. Celestron also improves its usage by adding compatibility with their SkySync GPS unit for a higher level of precision during setup and alignment. To provide a stable platform for the mount and your OTA, a heavy-duty stainless steel tripod is included that sports large 2" legs and an accessory tray that doubles as a stabilizer.

    The brain of the CGEM II is the NexStar+ computer controller. Equipped with a database of 40,000 objects, including the planets, stars, nebulae, galaxies, and the complete Messier catalog, it can also be programmed with up 100 custom user-defined objects with 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.

    Mount
    • German equatorial mount
    • 40-pound payload capacity
    • 15-70° latitude adjustment range
    • Dual-axis low-cog DC servo motors with optical encoders for smooth tracking and quiet operation
    • High-torque motors provide smooth tracking and slewing for heavy OTAs
    • Autoguider port for making corrections while astroimaging
    • Dual Vixen/Losmandy dovetail saddle, compatible with CG-5 and CGE bars
    • Long clutch levers make tightening and loosening of clutches easier for manual movement
    • Internal cables/wires for snag-free operation
    • GPS-compatible with optional SkySync unit
    • Runs on included 12 VDC, 3.2A car/vehicle power supply
    NexStar+ Hand Controller
    • Features:
    • Intuitive menu-driven user interface
    • Nine Slew Speeds: 2x, 4x, 8x, 16x, 32x, 0.3°/sec, 1.0°/sec, 2°/sec, 4°/sec
    • Multiple Tracking Rates: Sidereal, Lunar, and Solar
    • Anti-Backlash Correction: Trains out intrinsic play in gears for smoother movement and tracking
    • Permanent Periodic Error Correction (PPEC): Improves tracking precision for long-exposure astrophotography and imaging
    • Database:
    • 40,000-object database
    • 100 user-defined objects for customization
    • Filters for creating custom object lists
    • Solar system: All seven planets plus the Moon, Sun, and Pluto
    • Custom lists of all the brightest stars, double stars, variable stars, and asterisms
    • Custom lists of all the best galaxies, nebulae, and clusters as well as the complete Messier catalog and select NGC objects
    • Functions
    • Alignment options: One- or Two-star, Solar system, Quick, and Last
    • Sky Tour: Based on location, date, and time, the system shows the best objects in the sky and automatically slews to them
    • Object Info: Provides useful information about the selected object such as magnitude and constellation; includes extended information about 200 popular objects
    • Physical characteristics:
    • 2-line, 16-character LCD window with red backlighting for comfortable viewing without affecting night-adjusted vision
    • 19 function keys, backlit in red
    • Micro-USB port: Connect to a computer, for use with software programs for point-and-click slewing capability and updating firmware via PC
    Tripod
    • Stainless steel legs
    • Heavy-duty 2" diameter
    • Graduated markings on lower section for height repeatability
    • Accessory/eyepiece holder tray that doubles as leg spreader/lock
    • Weight: 20 pounds
    UPC: 050234915236
In the Box
Bundle Items
  • 6x30 Finderscope
  • 1.25" 90° Star Diagonal
  • 1.25" 25mm Plössl Eyepiece
  • Limited 2-Year Warranty
  • NexStar+ AZ Hand Controller
  • 17 lb Counterweight for the CGEM EQ Mount
  • Stainless Steel Tripod
  • Counterweight Shaft
  • NexRemote Software DVD
  • 12VDC Car/Vehicle Power Adapter
  • Limited Two-Year Warranty
Table of Contents
  • 1Description
  • C8-A-XLT CGE 8" f/10 Schmidt-Cassegrain Telescope (OTA Only)
    Optical Design Schmidt-Cassegrain
    Aperture 8.0" / 203.2mm
    Focal Length 2032mm
    Focal Ratio f/10
    Eyepiece Barrel Diameter 1.25"
    Diagonal 90° star
    1.25" snout and eyepiece holder
    Finderscope 6x30 mm
    Tripod None
    Mount Type CGE dovetail plate
    Compatible with Losmandy-style saddles
    Power Source None
    Optical Tube Length 17.0" / 43.2 cm
    Weight 12.5 lb / 5.7 kg
    Packaging Info
    Box Dimensions (LxWxH) 23.0 x 15.4 x 13.9"
  • CGEM II GoTo EQ Mount with Tripod
    Mount Type Equatorial
    Load Capacity 40.0 lb / 18.1 kg
    Motor Dual-axis low-cog DC servo
    GO-TO Capability Yes, NexStar+ hand controller
    Latitude Adjustment Range 15 - 70°
    Polar Axis Scope None
    Includes Tripod/Pier Adjustable-height stainless steel
    2"-diameter legs
    Power Source 12 VDC, 3.2 amps
    Weight Mount: 40.0 lb / 18.1 kg
    Tripod: 20.0 lb / 9.1 kg
    Total: 77.0 lb / 34.9 kg
    Packaging Info
    Box Dimensions (LxWxH) 42.5 x 19.8 x 13.1"

Celestron CGEM II 800 reviews

Be the first to review this item

Celestron CGEM II 800 Q&A

Celestron CGEM II 800 accessories

See any errors on this page? Let us know. aqsywbxsbzucyudfrwer