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Telescopes > Orion Optics UK > CT Ultra > Orion Optics UK Telescope N 250/1200 CT10 Carbon OTA
Product no.: 57564

Telescope N 250/1200 CT10 Carbon OTA

$ 3,050.00 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.

Standard or Long? The telescopes in this series have a short focal length which, with the addition of a camera adaptor and camera, can give you some spectacular photographic performance, primarily on Deep Sky objects. The L-Version has a higher focal length. It can provide you with stunning visual images at higher magnifications and be extremely useful in photographing the planets and the Moon.

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)
250
Focal length (mm)
1200
Aperture ratio (f/)
4,8
Resolving capacity
0,46
Limit value (mag)
13,8
Light gathering capacity
1280
Max. useful magnification
500
Tube weight (kg)
11
Tube material
Carbon
Tube length (mm)
1050
Coating
Hilux
tube diameter (mm)
300
Tube construction
Full tube

Reflector


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

Focuser


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

Mount


Type of build
OTA
Mounting type
no mount

Included accessories


Finder scope
8x50
Tube clamps
yes
Eyepiece adaptor
1,25" - 2"
2'' eyepieces
without
1.25'' eyepieces
without
Extension tubes
yes
Prism rail
yes

General


Series
CT Ultra
Total weight (kg)
13

Area of application


Moon & Planets
yes
Nebulae & galaxies
yes
Nature Observation
no
Astrophotography
yes (very good)
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 (6)
Carry case

Artesky Carry case Newton 250/1200

$ 163.00*
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

Skywatcher Mount EQ6-R Pro SynScan GoTo

$ 2,180.00*
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*

*All prices include VAT plus shipping costs.

Orion Optics UK Telescope N 250/1200 CT10 Carbon OTA
Mirror Cell
Orion Optics UK Telescope N 250/1200 CT10 Carbon OTA
Focuser

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