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Model Range

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Optics

Tube Rings

ACU-3S Focuser

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Carbon tube catadioptric
f6.8 telescopes for
exceptional
photographic
and visual
use

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AGODKDS2

Optional Dew Shield available - this is a matching, lightweight carbon fibre addition to help curb the onset of condensation in damp prone atmospheric climes. It is fitted or removed literally in less than a minute and greatly reduces the heavy dew precipitation which can so easily ruin what could be a classic imaging session.

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Upper Accessory
Support Plate

Lower
Support Plate

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.

ACU3SforODKpage1Exact 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.
odklightbkODK Light Path Diagram
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.

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