For those who prefer a catadioptric telescope which is exceptional both for photographic and visual use, we have introduced our Optimised Dall-Kirkham series, designated ODK.

Models available: ODK10, ODK12, and ODK16 all at f6.8
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 newly introduced Precision 3” Crayford Focuser featuring a 10:1 reduction drive included as standard and, as an option; we can include our electronic drive system with variable speed focusing control. Good images need good optics, all fitted in reliable, stable and precise engineering.
Note: Customers with heavier than normal (4kg+) CCD equipment, please see
AG page for possible uprated focusing possibilities.

The mirrors in our ODK range are hand figured to achieve excellent performance. Each mirror has many tests carried out in it's manufacturing process and also as a combined set of optics in the complete telescope, primary, secondary and corrector lens system. 
This ensures the group of optics is finished to yield as good an image as possible.

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To allow precise collimation, both primary and secondary mirrors can be collimated.

Computer optimised designs ensure both mirrors and corrector lenses can be brought to collimation easily and stay firmly in alignment. All ODK optical tubes are fitted with a dovetail plate.

If your preference is tube rings, we can fit these as an option.

ODK Std Equipment:

Prices quoted are for Optical Tube Assembly only. Carbon Tubes come complete with 3" Focuser, two support plates to which dovetails (supplied) or equipment, can be fixed as per your requirement.

NOTES: Please see Adaptors and Adjustment Rings link below left to achieve focus with all your equipment.
(If we have not got it on site please ask as we have state of the art CNC machines and will be able to accommodate you).

OC2 focusers on ODK models are designed to accept equipment up to and including 4 kg. If heavier equipment is planned, we have several options available to carry up to 7kg. Please contact us for detailed options.

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