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Orion optics UK ODK10 10 inch F6,8 Astrograph OTA

Prijs: 5.290,00 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 introductory model for the ODK range is our 250mm model, the ODK10. As with all the ODK models, the ODK10 is fitted as standard with our ACU-3S, 3” focuser to enable a strong focusing platform for a wide range of cameras. Being both a photographic and visual telescope you are assured of some spectacular views of the planets, the Moon and even faint nebulas and galaxies.

Full specification is shown below but if any feature you are interested in is not shown, please ask.

You will see from the spot diagrams that the ODK10 produces very tight, well defined images. The field size is usable to over 50mm ensuring you have the choice of some higher power imaging and views on axis for the planets and moon etc but also, the capability to present to your camera some amazing fields of Deep Sky objects, particularly those requiring a higher degree of magnicication.



Primary mirror diameter


Focal length


Focal Ratio


Tube Weight (inc.
mount plate/dovetail)


Tube Diameter


Tube Length


BFD (Back Focal
Distance) from cell face


Tube Material

Carbon fibre sandwich

Secondary Size


Mirror Cell

Honeycombe CNC
machined alum. cell


3" Crayford with 10:1 reduction

Corrector Design

Multi coated 3 lens

Flat Field Size


Spot Size on Axis


Spot Size at Field Edge


Mirror / Tube Cooling

3 Controllable fans.
Heaters optional

Attachment Method

CNC machined alum.
dovetail with supports

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