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Celestron Cgx 800 8" F/2 Rasa Goto Telescope

Celestron Cgx 800 8" F/2 Rasa Goto Telescope
  • Product Code: ga209626
  • Availability: In Stock

$13,797.00 $19,315.80

The Celestron 8" f/2.0 Rowe-Ackermann Schmidt Astrograph (RASA) is specifically designed for astrophotography and astro-imaging with a large aperture and fast focal ratio. Using four-element rare-earth optical glass lenses ensures accurate color rendition and eliminates aberrations such as coma and field curvatures. The improved StarBright XLT multi-coating system, which includes anti-reflection coatings on the lenses and highly reflective coatings on the mirrors, increases light transmission throughout the entire optical path. An integrated fan reduces cooldown time and provides optimal airflow through the optical tube assembly (OTA) while filtering harmful dust from the interior.

The astrograph design is defined by its fast focal ratio, which reduces exposure times without sacrificing image quality and gives you more time for multiple shots of the same object for layering or with different filters. Its internal Ultra-Stable focusing mechanism enables very precise focusing to clearly resolve topographic details on the Moon or split double stars and reveal details of most other celestial objects in between, while minimizing unwanted lateral movement of the primary mirror when focusing or slewing. Since this OTA is designed as an imaging scope, a 42mm camera T-adapter and C-mount imager adapter are included that are compatible with most camera-specific T-rings that are widely available.

Patented Catadioptric Astrograph Design    Fast Focal Ratio for Astrophotography    StarBright XLT Optical Coating System    4-Element Rare-Earth Optical Glass    Motorized EQ Mount & Steel Tripod    40,000-Object Database    Multiple Assisted Alignment Processes    Guided Tours and Custom Object Filters    Ultra-Stable Internal Focusing Mechanism    Includes Photo & Video T-Adapters

Parameters
Optical DesignRowe-Ackermann Schmidt
Aperture8.0" / 203mm
Focal Length400mm
Focal Ratiof/2.0
Back FocusWith included camera adapter: 0.98" / 25mm
From top of threaded collar: 1.14" / 29mm
Eyepiece Barrel DiameterN/A
DiagonalNone
FinderscopeNone
TripodNone
Mount TypeLosmandy-D/CGE dovetail plate
Power Requirement8 x AA batteries
12VDC, 100mA power adapter
DimensionsLength: 24.7" / 62.8 cm
Diameter: 9.3" / 23.5 cm
Weight17.0 lb / 7.7 kg
Packaging Info
Package Weight24.185 lb
Box Dimensions (LxWxH)30.6 x 14.8 x 14.6"

  • 203mm (8") diameter aperture enables near- and deep-sky viewing without being prohibitively large or heavy for easy transport to viewing locations
  • 400mm focal length helps to produce a fast focal ratio
  • Fast f/2.0 focal ratio requires significantly lower exposure times versus slower ratios to produce the same results
  • Rowe-Ackermann Schmidt astrograph (RASA) design is purpose built for astrophotography and imaging performance, and is not recommended for visual use
  • Proprietary StarBright XLT fully multi-coated optical system
  • Four-element rare-earth glass for true color rendition without aberrations across the entire field of view
  • Wide 390-800nm spectral range improves images of deep space objects like galaxies and nebulae
  • Image circle: 22mm (0.86")
  • Resolution: 0.68 arcsec (Rayleigh), 0.57 arcsec (Dawes)
  • Back focus: 25mm (0.98") with included camera adapter, 29mm (1.14") from top of threaded collar
  • Optical window can be removed and replaced with optional filters such as a light pollution filter
  • Integrated cooling fan brings optical system to ambient air temperature for better performance
  • Runs on eight user-supplied AA batteries or optional 12VDC power adapter

  • Multi-layer mirror coatings made from layers of aluminum, SiO2 (silicon dioxide), and TiO2 (titanium dioxide)
  • Reflectivity is flat across the light spectrum, for both astrophotography/astro-imaging
  • Multi-layer anti-reflective coatings made from layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide)
  • High-transmission water white glass corrector lens with 97.4% light transmission

  • Focusing system moves primary mirror forward and back to achieve tack-sharp images
  • Ultra-stable design minimizes unwanted lateral movement of the primary mirror when focusing or slewing
  • Fine adjustments for precise focusing, approximately 30 turns of the knob runs through the focus range

  • OTA only, mount and tripod required for proper use
  • Includes large CGE/Losmandy-D dovetail plate for use on larger more stable mount heads
  • Weight: 17 pounds

  • Standard M42 camera T-adapter accepts most camera-specific T-rings to directly mount DSLR and mirrorless cameras
  • CCTV/Imager C-thread adapter accepts most camera-specific video T-rings to mount imaging and video cameras
  • Battery pack takes eight user-supplied AA batteries to power the integrated cooling fan

Related Questions and Answers

Q: 1. Is there a case for this? I have done the measurements and this will not fit inside "BH #PEIM2720B". Not unless the OTA comes off the mount. Does the OTA come off the mount?

A: No, the Celestron CPC Deluxe 800 HD 8" f/10 Cassegrain Optical Tube Assembly is not meant to come off the mount. It needs to be stored attached to the mount. To store the OTA with mount one can use the Pelican 1690 Transport Case with Foam (Black), BH #PE1690FB (https://bhpho.to/3uB9Nl1).

Q: 2. Does it need a second counterweight to do astrophotography with a dslr maybe an autotracker?

A: It depends on the weight of your camera body. If your camera body is over 2 lbs. I would suggest additional counter balance weights.

Q: 3. Hi, I would be purchasing this for my grandson, he would want to be able to operate it manually, I didn't see that feature in its description, can it be operated manually?

A: You can operate manually through the remote with the arrow keys. As in physically maneuvering the scope it cannot be done. It would strip the gears. But you can adjust it yourself with that remote.

Q: 4. Does the Celestron 114LCM come with a case? If not, what is recommended?

A: This model does not come with a Case. The Pelican iM2720 Storm Trak Case with Foam (Black) is a recommended model in the Accessory Section under this Scope. Link to Model: https://bhpho.to/3rdqNKF

Q: 5. Can I use DSLR adapter?

A: Yes there is a way to connect a DSLR to this scope. I would need to know exactly which DSLR you have to recommend the proper adapters.

Q: 6. What are the dimensions of the OTA and the mount? Looking for a case to carry the telescope as check in bag.

A: Unfortunately the Manufacturer only provides the Length of the Scope it's 24 . The Mount you could fit with the Tripod in the Lightware C6042 42 Cargo Case, Padded. Website link: https://bhpho.to/2llio5l

Q: 7. What is the optical tubes weight, off the tripod?

A: Celestron does not list the weight of the Celestron 114LCM 114mm f/9 Computerized GoTo Reflector Telescope BH #CE114LCM • MFR #31150 OTA only. The total weight, OTA, mount and tripod is 15 lbs.

Q: 8. What is the weight limit on the racking mount?

A: That specific information is not published by Celestron The OTA is compatible with the mount. I have known customers to add APS-C camera bodies to the scope and mount without any problems.

Q: 9. What all can you see using the 114 LCM ?

A: I am a poor person to ask. The telescope is, I am sure, a fine piece of equipment. The problem is not in the stars, but in me. I had hoped that this telescope would open my granddaughter to wonderment about the stars and planets. My first attempt was in the summer. I set the telescope up under a patio umbrella draped over with mosquito netting. I could not get the three points in the sky needed to fix the computerized instrument. I managed to undrape the netting and get tangled in a web of confusion. Granddaughter gets bitten by mosquito, but not bitten by the bug of exploration. I tried again in late Fall. Too late. We had to retreat for hot chocolate inside. Mistakes were made as our politicians are wont to say. Don't mess with something you know nothing about! as my college roommate would say. Be sure you have someone who can instruct you on how to use this tool.

Q: 10. is there a solar filter for this scope?

A: Alpine Astronomical 115mm Baader AstroSolar White-Light Solar Filter for Spotting Scopes, Telescopes and Lenses BH #ALASSF115 • MFR #ASSF-115 https://www.bhphotovideo.com/c/product/1348149-REG/alpine_astronomical_assf_115_baader_astrosolar_spotter_filter.html

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