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

BH #CECGEMII800T • MFR #12010
Celestron CGEM II 800 203mm f/10 Schmidt-Cassegrain GoTo Telescope
Key Features
  • 203mm Schmidt-Cassegrain OTA
  • 2032mm Focal Length, f/10 Focal Ratio
  • CGEM II Motorized Equatorial Mount
  • NexStar+ Computer Controller
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.
Special Order
Expected availability: 2-4 weeks
$2,349.00

Celestron CGEM II 800 Overview

  • 1Description
  • 2Optical Tube
  • 3StarBright XLT System
  • 4Mounting
  • 5Included Accessories

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.

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

Celestron CGEM II 800 Specs

Optical DesignSchmidt-Cassegrain
Aperture8.0" / 203.2mm
Focal Length2032mm
Focal Ratiof/10
Eyepiece Barrel Diameter1.25"
Diagonal90° star
1.25" snout and eyepiece holder
Finderscope6x30 mm
TripodNone
Mount TypeCGE dovetail plate
Compatible with Losmandy-style saddles
Power SourceNone
Optical Tube Length17.0" / 43.2 cm
Weight12.5 lb / 5.7 kg
Packaging Info
Package Weight21 lb
Box Dimensions (LxWxH)23 x 15.4 x 13.9"
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