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Telescopes > Orion Optics UK > CT Ultra > Orion Optics UK Telescope N 200/900 CT8 Carbon OTA
( 5 / 5 )
Product no.: 57566

Telescope N 200/900 CT8 Carbon OTA

$ 2,510.00 incl. VAT, plus shipping costs
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Product description

More about the series CT Ultra...

In the case that this article currently is not available from the warehouse, please note the following: we order from this supplier in regular intervals. Please place your order now, so that we may take into account your order and deliver the article to you by the above-mentioned date.

Orion Optics UK CT Carbon Newtonian

The entire series of CT Carbon Newtonians benefits from common elements so you only have to choose your preferred aperture. Each model sports a superb carbon tube, 1/10PV Wavefront Optics and HiLux coatings. 4 Vane Steel Spider, 9 Point CNC Mirror Cell, OC1 Focuser with 10:1 slo-mo reduction.

Carbon tube: The CT series has a Sandwich construction Carbon Fibre tube with a very pleasing gloss external surface and matt black internal tube surface. Offering the ultimate physical stability with virtually zero expansion for focal plane maintenance.

Interferogram: Each CT telescope is being supplied with its exact optical specification, you will be presented with a ZYGO report with analyses of the mirror's paramaters in detail.

The rear mirror support is a 9 Point Flotation CNC machined Mirror Cell. This maintains positional acuracy and hence perfect image quality. Also at the rear, a fan cooling system will minimize cooldown times and help maintain image quality during viewing. Fans can be left in continuous operation.

Rings: Both sides of the rings are flat with inside M6 threats. This enables the attachment of numerous accessories such as dovetail plates and guiding scopes.

  • Sandwich Carbon tube for zero expansion
  • CNC manufactured rings
  • 97% HILUX coating for brighter images
  • 2" Crayford focuser with 1:10 dual speed
  • Backside of the scope is closed and upgraded with 3 fans
  • 4-arms low-profile spider
  • Primary mirror with 1/10 Lambda with Zygo Interferogram
  • Dovetailplate and mount are not included

Carbon Fibre Tube

This apochromat is well suitable to visual observing but was, in fact, developed especially for astrophotography. Use the advantages of a carbon fibre tube: it is particularly light and so even perfectly suitable for using on smaller mounts. The tube also offers a very high inherent stability and only minimal thermal expansion. These advantages are particularly useful for astrophotography, as the focus remains stable for the whole night. The dew shield is also carbon fibre and can be extended easily. In addition, the tube is lined with black felt.

Mirror Cells: The best optics in the world can be literally ruined unless they are supported correctly in a telescope’s body. Badly designed mirror supports (cells) are more than capable of turning the image from a 1/10PV wavefront mirror into worse than a whole wavelength of inaccuracy. This telescopes comes with a computer optimised, anodised aluminium surface cell with built in cooling fan (12V DC).
It has a 9 point, nylon66 tipped suspension system which spreads the ‘load’ of the mirror as evenly as possible over those 9 points at the back of the mirror.

Focuser ACU-2S: This is a high quality 2” (50.8mm) Crayford focuser. The actual mechanism is ultra smooth, both in its normal focusing speed and, in its lower geared 10:1 ratio micro adjustment for precise focusing with an eyepiece or camera. For photography it is ideal for small to medium sized cameras, including DSLR and medium format CCD chips. Looking the knurled knob will tighten the draw tube in the chosen position and no movement is produced to offer, sharp, flawless images.

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
Newton
Aperture (mm)
200
Focal length (mm)
900
Aperture ratio (f/)
4,5
Resolving capacity
0,58
Limit value (mag)
13,3
Light gathering capacity
820
Max. useful magnification
400
Tube weight (kg)
7
Tube material
Carbon
Tube length (mm)
860
Coating
Hilux
tube diameter (mm)
255
Tube construction
Full tube

Reflector


Secondary mirror diameter (mm)
63
Primary mirror - Material
Suprax
Adjustable
yes
finish quality
1/10
reflectivity
97
Ventilation for central mirror
yes
Secondary mirror obstruction
32
secondary mirror spider legs (piece)
4
mirror cell support points
9

Focuser


Connection ( to eyepiece)
2
Type of build
Crayford
Free aperture (mm)
50,9
Ring clamp
yes
Gear reduction
1:10 fine focusing
Adjustment range (mm)
23

Mount


Type of build
OTA
Mounting type
no mount

Included accessories


Finder scope
8x50
Tube clamps
yes

General


Series
CT Ultra
Total weight (kg)
8

Area of application


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

Recommended for


Beginners
no
Advanced
yes
Observatories
no

Recommended accessories

Workshop service (1)

Astroshop Collimation/adjustment Newtonian 8"-12"

$ 82.00*
Telescope accessories > Transport & storage (5)

Omegon aluminium case, large

$ 89.00*
Telescope accessories > Other (9)
Finder

Omegon Radiant Finder with fastener

$ 49.90*
Eyepieces (4)
Eyepiece

Omegon LE Series Eyepiece, 12.5mm, 1.25''

$ 149.00*
Eyepieces (4)
Eyepiece

Omegon Ultra Wide Angle eyepiece 9mm 1,25"

$ 69.00*
Eyepieces > Other (7)
Reticle eyepieces

Omegon Reticle eyepieces Illuminated crosshair eyepiece, 12.5mm

$ 89.00*
Filters > Moon filters & Polarizing filters (4)
Filters

Omegon Filters Variable grey filter 1.25"

$ 39.90*
Filters > Nebulae filters (8)
Filters

Omegon Filters Nebula/ city light filter 1.25 ''

$ 39.90*
Filters > Other (2)
Filters

Omegon Filters Color filter set 1,25'' (6 pieces)

$ 69.00*
Astrophotography > Camera adaptor (4)
Projection adapter

Omegon Camera adapter 1.25"

$ 24.90*
Astrophotography > Camera mounts (4)

Omegon Easypic Universal Smartphone Adapter

$ 99.00*
Astrophotography > Other (3)
Camera

Lacerta Camera Standalone Autoguider MGEN Version 3

$ 1,020.00*
Mounts & accessories (1)
Mount

Meade Mount LX85 GoTo

$ 1,631.21*
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*

*All prices include VAT plus shipping costs.

Orion Optics UK Telescope N 200/900 CT8 Carbon OTA
Mirror Cell
Orion Optics UK Telescope N 200/900 CT8 Carbon OTA
Focuser

Customer reviews

Orion Optics UK CT8 - update

Review by Medojedlik on 08.10.2019 11:30:39

( 5 / 5 )

to the 3rd point - focues, I meant it's not by any means bad one :)

Orion Optics UK CT8

Review by Medojedlik on 08.10.2019 11:13:08

( 5 / 5 )

I purchased this scope in order to get "all rounder" scope for visual & astrophotography which will be portable and stable on EQ6R mount. All point's checked with this one. I had opportunity to try it the same day (night) I received it (really unique situation considering that once you buy something astro related, you usually get at least week of cloudy weather :) and apart of few things I am amazed. Scope came with strehl 0.992 primary and really, details on moon were breathtaking. Even without coma corrector the views of night sky were nice with wide angle 20mm omegon eyepiece. Only outer field of view was affected with coma, which is of course part of the fast (f4.5) Newtonian telescope design. I found only few things that could be better in this price range. 1st the spider. It's basic one, it was working fine and hold collimation stable through the night, but it's not that stiff as I would expect. You'll find it a bit wobbly when collimating the secondary mirror. I immediately changed the collimation screws for 35mm m4 bob knobs, which are making collimation easier, but you need to count with the flexing spider when tightening the knobs. 2nd the knobs on primary cell...I would say that these could be done with knurled knobs so the collimation could be tool less process. Otherwise the mirror cell is very fine, holding the mirror on place, good job on this one. And lastly 3rd. the focused. It's by no means good one, nicely supporting DSLR or eyepieces, but mine came with somehow very stiff eyepiece locking screw...this will probably get better by wearing it out by usage :) Overall really good all round telescope with few glitches which can be healed :)

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