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Telescopes > Celestron > RASA > Celestron Telescope Astrograph S 203/400 RASA 800 OTA
Product no.: 60246

Telescope Astrograph S 203/400 RASA 800 OTA

$ 2,620.00 incl. VAT, plus shipping costs
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  • Optimised for astrophotography
  • Portable for mobile use

Product description

More about the series RASA...

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.

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.

Specifications

Optics


Type
Reflector
Type of build
Astrograph
Aperture (mm)
203
Focal length (mm)
400
Aperture ratio (f/)
2
Resolving capacity
0,68
Light gathering capacity
843
Tube length (mm)
628
Coating
Starbright XLT
Tube material
Aluminium
Tube weight (kg)
7,9
Limit value (mag)
13,3
tube diameter (mm)
235
Tube construction
Full tube

Reflector


Secondary mirror obstruction
46
Secondary mirror diameter (mm)
93
Ventilation for central mirror
yes

Focuser


Backfocus (mm)
29mm & 25mm
Gear reduction
1:10 fine focusing
Type of build
Linear Crayford

Mount


Mounting type
no mount
Type of build
OTA

Included accessories


Prism rail
Losmandy-Style
Camera adaptor
M42 & C-Mount
Battery compartment
yes
Carrying handle
yes

General


Series
RASA

Area of application


Moon & Planets
no
Nebulae & galaxies
yes
Nature Observation
no
Astrophotography
yes
Sun
no

Recommended for


Beginners
no
Advanced
yes
Observatories
yes

Miscellaneous


Battery type
Mignon (AA, LR6)

Recommended accessories

Telescope accessories > Transport & storage (5)

Omegon aluminium case, large

$ 89.00*
Telescope accessories > Other (11)

Celestron Focuser Retrofit Kit for RASA 1100

$ 31.90*
Eyepieces (2)
Reticle eyepieces

Omegon Reticle eyepieces Illuminated crosshair eyepiece, 12.5mm

$ 89.00*
Filters > Nebulae filters (64)
Filters

Astronomik Filters SII 6nm CCD MaxFR Clip Sony alpha 7

$ 770.00*
Filters > Other (5)

Baader UFC S70 / RASA 800 Adaptors

$ 93.00*
Astrophotography > Cameras (6)
Camera

ZWO Camera ASI 294 MC Color

$ 962.00*
Astrophotography > Camera adaptor (5)
Camera adaptor

Celestron RASA 8 suitable for Sony cameras

$ 97.00*
Astrophotography > Camera mounts (4)

Omegon Easypic Universal Smartphone Adapter

$ 99.00*
Astrophotography > Other (2)
Guidescope

Omegon Guidescope module finder

$ 99.00*
Mounts & accessories (3)
Mount

Celestron Mount CGX GoTo

$ 3,490.00*
Observatories (1)

Omegon Tent observatory

$ 189.00*
Media (2)
Star chart

Omegon Star chart Planisphere

$ 14.90*
Outdoor (2)
Headlamp

Omegon LED headlamp

$ 13.90*
Globes & Maps (1)
Continental map

Oculum Verlag Sky Quality Map Europe

$ 18.90*
Maintenance & Cleaning > Lens cleaners (3)

Omegon 7-in-1 lens cleaning set

$ 19.90*
Maintenance & Cleaning > Other (2)

Omegon microfibre cleaning cloth 20cm x 20cm

$ 4.90*
Miscellaneous (1)

Varta Professional Mignon (AA) lithium batteries, pack of 4

$ 14.90*

*All prices include VAT plus shipping costs.

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

Typical application 1

Celestron Telescope Astrograph S 203/400 RASA 800 OTA

Typical application example 2

Celestron Telescope Astrograph S 203/400 RASA 800 OTA
Example - Comet 46P/Wirtanen taken by Michael Jäger with an RASA 800

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