The NortheK DK 250 is the preferred solution for visual and photographic hi-res observation of small angular dimension objects, such as surfaces and Moon, planet.
NortheK has taken the challenge to implement this optical design, normally intended for amateurs, with its mechanical and composite material technologies.
A slightly lower price than the Classical Cassegrain makes it more affordable for the customer who wants a dedicated hi-res instrument.
As usual, we didn’t compromise on quality. The primary mirror has an f/3 focal ratio; just as in the Classical Cassegrain, because we consider and do our best accomodate the needs of the amateur astronomer for a compact , lightweight and good quality O.T.A. to be carried around.
A very specialized, top range instrument, on wich any Solar System avid observers can rely (and that will give them all the enjoyment and satisfaction possible with this diameter)
The DK 250 from NortheK is a very high quality reflector telescope with a Dall-Kirkham optical scheme (parabolic primary and convex spherical secondary).
As per any other 250 mm. opening model from NortheK, the tube is the high peforming UnitorK with StabilobloK cell and secondary support AxyS, all of them being made on projects owned by NortheK.
As per the classic Cassegrain, the field has been kept at 30 mm. diameter, a bit over-specified for the duties of this O.T.A. but certainly very interesting for large lunar surface shots.
Considering the price of a modern and high performing telescope, NortheK believe their customers should not compromise on any aspect when buying an instrument, that is why they offer for the DK 250 engineering as accurate as for the instruments with larger diameter and higher performance.
The back focus is 250 mm. as the NortheK RC 250 and CS 250. There is space enough to attach whatever you need to your Dall-Kirkham sc as accessories, filters-holders wheels, joints etc.
As the resulting focal length of 5000 mm. is very long, there is no need of a Barlow lens to increase the focal length and it also possible to use long focus eye-pieces.
For this beautiful O.T.A. it is also available the Feather Touch FTF 2000 focusing system and a motorized focuser.
Happy journey through the Solar System! And beyond, if you can…
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.