With a NortheK CS 250 you can enjoy professional performances in high-resolution. This is the Classical Cassegrain, “the” instrument for the uncompromising user, both in photographic or visual applications.
This optical design is uncommon among amateur astronomers because to achieve the best performances in small diameters requires compes design and construction. NortheK has accepted yet another challenge: to build a high-performance small diameter instrument keeping the costs affordable for an average user.
This is an excellent instrument for high resolution, ideal to view objects with a limited angular width. The best performances are achieved when observing planets but it also gives goods results when viewing star clusters, planetary nebulas and galaxies.
Thanks to its high focal length and the wider corrected field – if compared to a Dall Kirkham scheme – this instrument is ideal for the observation of the Moon and also other planetary surfaces.
The open primary f 3 focal ratio allows the use of a short and compact tube. The design aim has been to achieve the best mechanical stability in order to optimize the optical performance. The optical lay-out is critical thus the cost is similar to the Ritchey Chrétien photographic.
The NortheK CS 250 is the best instrument in its product range, unrivalled from both an optical and mechanical point of view.
Whit this O.T.A., once again, the Maxproject Team has developed an excellent piece of apparatus.
This is the ultimate instrument for the very discerning and competent user.
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.