Orion introduces wide range of models in telescope that caters in different series. Orion CT8 Ultra Newtonian Telescope belongs to the ‘CT Range’ of products that are been designed with the Newtonian technology. Many special features are common to all the models of this series although they vary in power and technical aspects.
Outstanding Design: All the models of this series of CT Range have a Sandwich construction of Carbon fiber tube with gloss finish on the surface and the matt black finish in the internal tube surface. They are the ones with the ultimate stability and making its performance impressive with the virtually zero expansion for the focal plane maintenance. Looking further is understood that it is been embedded with the fan cooling system at the rear side. This helped in maintaining the image quality even during the continuous viewing. The tube diameter and the tube length measures 250mm and 860mm respectively. The tube weighs about 7kg and it makes easy for transporting.
Technical power of the device: Orion CT8 Ultra Newtonian Telescope although stated to be the basic design in this series with the enrichment of advanced features, it serves best for the celestial observations. The power and the ability of this telescope is been discussed further.
- Aperture – The objective lens diameter measures 200mm, it makes the images look brighter that it is actually present. The viewing experience is good for the lunar and the planets but penetrating the deep sky will not be as impressive.
- Focal length and Focal ratio – With the focal length of 900mm and the focal ratio of 4.5 the images that are been viewed makes it sure to offer a detailed one. The transmitted images can be viewed in a clear and brighter way.
- Finder scope – Available with Orion CT8 Ultra Celestial Telescope the finder scope of 8×50 to locate the objects and follow the desired object.
The Telescope does consist of stainless steel fully adjustable four-vane spider and a focal mount that belongs to the type of 2” OC1 Crayford with 10:1 drive.
Lens: This Newtonian Telescope comes with the special HiLUX optical coating that is been found in the latest models, it has the advantage as it increases the brightness of the viewing objects by 25%. It also comes with the certification that gives a 100% assurance to the quality. Optical glass main mirror that is been embedded is Suprax, to offer a clear and detailed viewing. This ultra grade optics is the development of skills for over 20 years and has brought out the best of it to impress the world.
Verdict: Orion CT8 900mm Telescope belongs to the basic model of the CT Series, with the features like the dual speed focuser, carbon fibre construction, high reflective coating, and fan cooking system makes it an all-new experience for the user. The included cradles and finder scope comes as an advantage. An electronic focus control also comes as an option. This is a sure to impress model for the beginners and intermediate level users. Further, it is capable of offering unlimited hours of excitement exploring the dark sky.
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Orion CT8 Ultra Newtonian - Technical Specifications, Features
| Manufacturer | Orion |
| Model Name | CT8 Ultra Newtonian Telescope |
| Telescope Type | Newtonian |
| Tube weight | 7 kg |
| Focal length | 900 mm |
| Focal ratio | 4.5 |
| Rings | CNC machined tube rings anodized black |
| Mount | 2″ OC1 Crayford with 10:1 drive |
| Extension tube | 50mm long screw threaded |
| Finder scope | 8×50 |
| User level | Beginner to Intermediate |
| Application | Celestial observation |
| Tube length | 860 mm |
| Tube diameter | 250mm |
| Optical design | Enhanced Hilux coating |
| Tube material | Carbon fibre sandwich |
| Optical glass main mirror | Suprax |
