Orion Optics UltraNewton CT8 f4.5 Orion Optics tube optic

* The mount shown in the image is not included with this product, it is shown for illustrative purposes only.

The CT series of Ultranewtonian telescopes from the manufacturer ORION OPTICS UK brings together the best elements of the extensive product range they manufacture and fuses them into a single instrument. With the CT telescopes, ORION OPTICS UK far surpasses what any other telescope of this type and range can offer.

With a carbon fiber tube and optics called ULTRA GRADE OPTICS by the manufacturer(with a wavefront perturbation of 1/10 PV), the CT Ultranewtonians will astound everyone with their clarity and potential.

It is important to remember that when we talk about a PV (Peak to Valley) perturbation, we are referring to the distortion that the wavefront suffers when passing through the optical system (mainly referring to the reflection in the mirrors). Logically, the smaller this distortion is, the better, as this will result in a much sharper and more defined image. Therefore, having an optic with a 1/10 PV wavefront is much better than having one with 1/8 PV.

All models in the ORION OPTICS UK CT series benefit from the same elements, so just select the type of diameter you want and the relevant focal ratio. Each model carries the carbon fiber tube, has optics at 1/10 PV of the wavefront and the famous HiLux optical treatments.

A spider with 4 steel shafts, the primary located in a cell with 9 suspension points, ACU-2S focuser with 10:1 speed reduction and 8x50mm finder. The CT scopes have a carbon fiber reinforced structure finished in an attractive glossy enamel on the outside, while the inside has a matte black finish. They also offer maximum structural stability with virtually zero expansion/dilation coefficient to keep the focal plane unchanged. The primary mirror support is the numerically controlled machined cell with 9 support points created by ORION OPTICS UK. This allows to maintain the precision in the mirror position and therefore to guarantee the perfect image quality. Also at the rear, where the primary is housed, is where the fan cooling system is located to minimize the time taken for the tube to thermally acclimatize.

The fans can be left permanently in operation. ORION OPTICS UK's precision focuser, the OC1 has a silky smooth touch with a 10:1 reduction that will give maximum focusing accuracy. A variable speed electronic focuser is also available as an additional accessory (this option involves replacing the 10:1 focuser).

A quality 50mm achromatic finder is included with the telescopes to aid in locating fainter objects. No eyepieces are included as standard with ORION OPTICS UK CT telescopes. ORION OPTICS UK' s new CT Ultranewtonians incorporate the best optics available on the market, and ORION OPTICS UK guarantees it!!!

ORION OPTICS UK 's reputation is only achieved by truly supplying the highest quality optics. ORION OPTICS UK 's ULTRA GRADE optical processing is the culmination of over 20 years of skill development and an investment of several hundred thousand Euros in research and ZYGO testing of all equipment.

To take optical performance further, HiLux treatments increase the brightness of the telescope image by 25% over traditional treatments and also significantly increase the life expectancy of the mirror treatments. In order to guarantee 100% to the customer that the equipment is being supplied with the technical specifications it is supposed to meet, an extensive ZYGO report with the analysis of the mirror parameters is enclosed with each telescope.

Diameter: 200mm
Focal length: 900mm
Focal ratio: F4.5
Spider with 4 adjustable legs: stainless steel fully adjustable
Focuser: 2" ACU-2S Crayford with 10:1 reducer
Extender tubes: threaded and 40mm length
Optical glass primary mirror: Suprax
Optical treatments: HiLux enhanced
Tube diameter: 250mm
Tube length: 860mm
Tube material: carbon fiber reinforced
Finder: 8x50mm
Secondary size: 63mm
Primary cell: CNC machined aluminum with 9 suspension points
Secondary mount: CNC machined aluminum with rotating bracket
Tube weight: 7Kg
Rings: black anodized and CNC machined rings
Rings weight: 1 Kg
Case dimensions: 87x48x48 mm
Case weight: 10.7 Kg