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Astronomy > Telescopes > Celestron > CGX > Celestron Telescope Astrograph S 203/400 RASA 800 CGX GoTo
Product no.: 62269

Telescope Astrograph S 203/400 RASA 800 CGX GoTo

$ 5,900.00 incl. VAT, plus shipping costs
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Product description

More about the series CGX...

Digital Schmidt camera for wide angle astrophotography!

This astrograph makes it very easy to create stunning photos with a modern DSLR or astronomical CCD camera. The new optical design has a four-lens corrector, incorporating rare earth glass, which suppresses chromatic aberrations and other problems such as coma and field curvature. Never before has an astrograph in this price range delivered such optical quality and spot size over the entire image field. The design also allows for a very low vignetting.

  • super-fast 11" f2.2 optics - sharply images APS format and is even optimized for sensor sizes up to a 70mm field diagonal.
  • extremely short exposure times - the RASA Astrograph acquires images twenty times faster than at f10! Thirty seconds at f2.2 correspond to ten minutes at f10 - tracking control is hence superfluous!
  • huge field of view - with a 620mm focal length, makes wide-angle shots a piece of cake and you and always have an overview
  • excellent focusing mechanism - new bronze bearings reduce image shift, the 10:1 FeatherTouch micro-focuser allows highly precise focusing!
  • innovative Features - quieter 12V MagLev fan reduces the cooling phase, keeps out dust and allows optimum air circulation in the OTA. Various adapters for popular camera brands are included. Back focus for the camera supplied adapters: 55mm, back focus for the front lens group: 69.26mm

RASA stands for Rowe-Ackermann-Schmidt Astrograph - Dave Rowe and Mark Ackermann are renowned optical instrument designers. Together, they hold numerous patents on their inventions. The RASA astrograph combines their expertise and experience.

Note: The RASA 800 doesn't work with regular DSLR cameras (because of a short backfocus). It is recommended to use the RASA 800 with mirrorless cameras or small dedicated CCD or CMOS astronomical cameras.

CGX Equatorial Mount and Tripod:

For eight years, Celestron’s workhorse CGEM mount lineup has been the German Equatorial backbone for telescopes ranging from 6 to 11 inches of aperture. Since that time, many more astro-imagers and planetarium controlled setups have emerged as backyard telescope technology has evolved. Celestron’s engineering team applied their years of experience designing German Equatorial mounts to the all-new CGX EQ, a culmination of all the advancements made to our technologies, value, and ease-of-use.

All-new design:

  • Sturdier and more rigid with quicker dampening time
  • Improved motors provide more torque, better slewing and tracking under heavy loads
  • Heavy Duty belt-drive system minimizes backlash while providing smooth motor operation under heavy loads
  • Spring-loaded brass worm wheel and stainless steel worm gear reduce friction and provide optimum gear mesh
  • Internal cabling for worry-free remote operation. Power input and accessory ports remain stationary while the mount slews to avoid snags
  • Internal hard stops for both axes prevents cable tension and tripod strike
  • Home sensors allow the mount to always start in the index position regardless of orientation before a power reset
  • Limit sensors automatically shut off slewing or tracking before reaching the hard stop fail safe
  • Adjustable EQ head position to optimize center of gravity over the tripod and fully utilize the increased 3º-65º latitude range
  • Dual-fit CG-5/Vixen and CGE/Losmandy dovetail saddle

New improved tripod:

  • 2" steel legs with height index marks for quick leveling
  • "Jack of all trays" can hold three 1.25" eyepieces, two 2" eyepieces, your smartphone, or other accessories
  • Tripod legs can be collapsed with accessory tray installed for faster setup and transport

Electronics:

  • All-new NexStar+ hand control with USB port
  • Two AUX accessory ports to support wireless/WiFi alignment and operation with StarSense AutoAlign and SkyPortal WiFi Module accessories (sold separately)
  • USB 2.0 port, used to connect directly to PC with included software
  • Autoguider port
  • PPEC ready
  • Threaded 12VDC power input barrel connector
  • Internal Real Time Clock (keeps time and site information saved)

The new CGX was designed to better support your telescope for both visual and astro-imaging pursuits. Key design goals included a lower profile EQ head, which provides a more compact and therefore more stable setup; a better drive system; remote operation-friendly with home and limit optical sensors; easier polar alignment adjustments; and better cable management. In addition to that, we’ve made mechanical and ergonomic improvements throughout to make the mount sturdier, easier to use, and transport. The CGX is our new Equatorial backbone to support a wide range of telescopes.

Control software from PlaneWave Instruments for Celestron's CGX and CGX-L mounts:

PWI Telescope Control opens up the full precision of these mounts. A USB connection from the mount to your PC means the Sky Viewer display makes it easy to find targets. Or you can search for your targets in the extensive object database. PWI also has a connection to the SIMBAD astronomical online database for even more astronomical objects.

PWI uses PointXP Mount Modelling - providing numerous reference stars for the highest accuracy possible. PointXP (also used in the StarSense AutoAlign module) offers more accuracy than a classic hand control box. By using numerous reference stars, PWI can accommodate multiple alignment errors, including device deflection - as a result, GoTo accuracy is increased.

Features of PWI software

  • PointXP Mount Modelling, accepts as many reference stars as you want.
  • developed by Celestron in partnership with PlaneWave Instruments
  • future updates will include additional features and enhancements
  • Sky Viewer Star chart for easy location of astronomical objects
  • extensive object database, including online database

The software runs on Windows 7, 8 and 10. You can download it via the Downloads tab. You will also find an English-language manual in PDF format available there.

It not only matters which telescope you buy but also where you buy it. Our additional services:

  • We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
  • We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.
  • We also provide an edition of the exciting astronomy magazine, “Sterne und Weltraum” with each telescope.

Specifications

Optics


Type
Reflector
Type of build
Astrograph
Aperture (mm)
203
Focal length (mm)
400
Resolving capacity
0,68
Light gathering capacity
843
Aperture ratio (f/)
2
Tube length (mm)
628
Tube material
Aluminium
Coating
Starbright XLT
Tube weight (kg)
7,9
Tube construction
Full tube

Reflector


Ventilation for central mirror
yes
Main mirror´s construction
spherical
corrector plate coatings
Starbright XLT

Focuser


Type of build
primary mirror focusing

Mount


GoTo control
yes
Type of build
CGX
Load capacity (kg)
25
Mounting type
Equatorial
Weight (kg)
28,7
Encoder
yes
Power supply
12
Polar elevation setting (°)
3 - 65
Cable-guide
internal
Motors
Servomotors
Mounting saddle
Losmandy & Vixen

GoTo control


GPS
optional
Software
Nexstar+
GoTo Language
German, English, French, Spanish, Italian
Interfaces
2x Aux, USB 2.0, Autoguider
Tracking speeds
sideral, solar and lunar
WIFI
optional
PEC correction
yes
Polar Alignment
All-Star Polar Alignment
Database
40.000
Remote
Celestron PWI

Tripod


Accessory plate
yes
Type
Tripod
Material
Steel
Tripod leg diameter (mm)
51
Weight (kg)
8,7

Included accessories


Polar finder scope <p>
no
Prism rail
Losmandy-Style
Dew Shield
no
Counterweights (kg)
2x 5
Power pack
no
cigarette lighter socket
yes
Transport cases
no
Eyepiece adaptor
1,25" - 2"
Finder scope
9x50
Battery compartment
yes
Camera adaptor
M42 & C-Mount

General


Series
CGX
Total weight (kg)
56

Area of application


Astrophotography
yes (very good)
Moon & Planets
yes
Nature Observation
no
Nebulae & galaxies
yes
Sun
no (Only with appropriate Sun filter)

Recommended for


Beginners
no
Advanced
yes
Observatories
yes

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*All prices include VAT plus shipping costs.

Celestron Telescope Astrograph S 203/400 RASA 800 CGX GoTo
Rear View - the telescope has been optimized for astrophotography and has no focuser.
Celestron Telescope Astrograph S 203/400 RASA 800 CGX GoTo
Cross-section through the light path
Celestron Telescope Astrograph S 203/400 RASA 800 CGX GoTo
Toothed belt drive

Celestron Telescope Astrograph S 203/400 RASA 800 CGX GoTo
Convenient carrying handle

Celestron Telescope Astrograph S 203/400 RASA 800 CGX GoTo
Example of use
Celestron Telescope Astrograph S 203/400 RASA 800 CGX GoTo
Example image 1

Celestron Telescope Astrograph S 203/400 RASA 800 CGX GoTo

Example image 2

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