DK 230

The NortheK DK 230 is a Dall Kirkham telescope. This scheme allows an easy use of the surfaces, the focal ratio of f 12 gives a long but not excessive focal length very suitable for direct viewing.

The excellence of NortheK engineering has provided a compact tube lenght of 700 mm and a low weight of 12 Kg in this telescope. Taken together these two  features are why we call it the “ultraportable”. This instrument is ideal for people on the move or with restricted space to observe.

Despite the limitations due to its scheme and the focal ratio, this is still a multitasking instrument and will provide satisfaction even for experienced users.




The NortheK DK 230 is a entry level but still high quality reflector telescope. It uses the Dall Kirkham  optical scheme which involves a parabolic primary and a convex spherical secondary mirrors. It aims a universal use in not too long observation fields.

In this price range there is a lot of competition from other brands and manufacturers. But by  supplying an excellent quality at a competitive price NortheK never compromise on the value  for money! We believe there are no other telescope available at the same cost that offers matching quality and features.

The telescope tube is obtained from a 10 mm thick Anticorodal 6060 extrusion. This is  machined and drilled with special tools and jigs in order to get perfect orthogonal axis to ensure the absence of any bending and distortion of the optical tube.

The carbon version is built with a high module laminated carbon fiber tube, protected by two headers in aluminum alloy, this has drastically reduced the final weight of the instrument.

The mirror cell has six floating points and is based on a ring and plate structure with three side supports at 120 degrees. This is necessarily simplified compared to  the superb StabilobloK 25  as it must stay within the price budget, but it has been made with precision and thoroughly  tested without compromising the performance.

Three rear fans of 60 mm diameter allow the telescope to achieve the thermal equilibrium within less than half an hour.

The focuser provided is the fabulous 2″ Feather Touch whit all tis special accessories.

Explore the NortheK world with DK230!

Optical scheme Dall Kirkham
Nominal optical aperture 230 mm.
Actual optical aperture 226 mm.
Focal ratio f 12
Effective focal lenght 2760 mm.
Primary mirror focal lenght f 2.6 598 mm.
Back focus 250 mm.
Thickness of primary glass 25 mm.
Glass of primary and secondary Suprax Schott Germany
Reflective coating type Quartzed aluminum SiO2
Optical surface correction diffraction limited
Strehl ratio 0,96
Average reflection 94%
Primary diaphragmation 4 mm.
Diameter of the secondary 55 mm.
Thickness of the secondary 15 mm.
Secondary mirror focal multiplier factor 4,6
Actual obstruction 30%
Diameter of the 100% illuminated field 10 mm.
Maximum diameter of the tool/instrument 300 mm.
Internal diameter of the alloy tube 280 mm.
Maximum lenght of the tube, without accessories 650 mm.
Maximum weight without accessories kg. 12 (9 kg. carbon tube)
Cell holding the primary six points
Secondary holder NortheK AxyS
Structure of the whole tube Alloy tube/ carbon tube
Swallow-tailed holder and plate Dovetail  Vixen/Losmandy + AW300
Outer protection Hard anodization, colour bleu
Nuts and bolts Stainless steel, Ergal
Standard searcher 8×50 achromatic
Focus Feather Touch FTF 2000 2″
Tool box Included
Maintenance manual Included
Optic cap Included
Primary mirror baffles 2 (u.r.)
Thermometric probe Upon request
Optics cleaning set Upon request
Feather Touch MKIT 20 Upon request

The exact optical parameters such as back focus, distance between primary and secondary, dimensions of the glasses, are confirmed exactly in the optical certificate provided with each optic and/or instrument.

Product code: OTA230DK Sale unit: piece


Product traceability and security codes: every NortheK O.T.A. has its identification number stamped in a specific and fixed position and it contains alla production data and the relevant code of the customer who bought it. This number guarantees the product is Made in Italy , its traceability and the origin of the source project. The stamp is laser marked and cripted.