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Orion optics UK ODK12  12 inch F6,8 Astrograph OTA
Orion optics UK ODK12 12 inch F6,8 Astrograph OTA
7.530,00 EUR
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Orion optics UK ODK12 12 inch F6,8 Astrograph OTA
[OOUK_ODK12]

Prijs: 7.530,00 EUR

 
Product Details

The full range is based on a focal ratio of f6.8, fast enough for some superb deep sky photo-visual use and, still have enough focal length for high resolution planetary work both visual and CCD applications.


The tube is constructed from Carbon Fibre sandwich design. Very, very strong to avoid flexing and, zero expansion to ensure the focal plane does not change over long photographic exposures. Being an open tube design and very short, cool down times are remarkably fast.

To assist cool down of the telescope, each model is fitted with three fans, all positioned behind the primary mirror.

Exact focusing across the ODK range is achieved with our own Precision ACU-3S 3” Crayford Focuser featuring a 10:1 reduction drive included as standard - focuser pictured right. Good images need good optics, all fitted in reliable, stable and precise engineering.

Customers with heavier than normal (4kg+) CCD equipment can add features to the ODK tube to enhance stability.

To produce the photo-visual wide, flat field of the ODK range, we have designed and fitted integrally, a corrector lens system. which ensure both colour correction, coma and spherical aberration are optimised to achieve almost a perfect photographic and visual field. Adequate back focus allows all modern CCD cameras to be used with auxiliary equipment. Multi layer anti reflection coatings are applied to all lens surfaces to maintain brighter images.

CNC machined mono construction secondary spider and trim ensures stability in collimation. Our unique collimation adjustment system enables perfect collimation of the secondary mirror to be achieved, quickly and reliably.

The ODK12 and all the range is based on a focal ratio of f6.8, fast enough for some superb deep sky photo-visual use and, still have enough focal length for high resolution planetary work both visual and CCD applications.

The tube is constructed from Carbon Fibre sandwich design. Very, very strong to avoid flexing and, zero expansion to ensure the focal plane does not change over long photographic exposures. Being an open tube design and very short, cool down times are remarkably fast.

Images from the ODK12 are spectacular.

Visually it offers you views of the planets which you will find incredible. The high resolution of the instrument across the whole of it's field ensures planets at the centre or stars, right to the edge, are incredibly sharp and crisp. A result of the computer enhanced design followed by skilful hand finishing by skilled opticians.

Specification

ODK12

Primary mirror diameter

300mm

Focal length

2040mm

Focal Ratio

f6.8

Tube Weight (inc.
mount plate/dovetail)

19kg

Tube Diameter

350mm

Tube Length

615mm

BFD (Back Focal
Distance) from cell face

218mm

Tube Material

Carbon fibre sandwich

Secondary Size

120mm

Mirror Cell

Honeycombe CNC
machined alum. cell

Focuser

3" Crayford with 10:1 reduction

Corrector Design

Multi coated 3 lens

Flat Field Size

>52mm

Spot Size on Axis

1.8µ

Spot Size at Field Edge

5.6µ

Mirror / Tube Cooling

3 Controllable fans. Heaters optional

Attachment Method

CNC machined alum. dovetail with supports

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