All Nauris telescopes are custom-made after ordering and are constructed from the highest quality components. Therefore, you should expect a delivery time of approximately 3-6 months!
The NaurisVātesAstrograph (Standard Version)
The highlight of all Vātes Astrographs, apart from their stable and extremely lightweight overall construction, are the optical components and their mounting. The primary mirror is individually manufactured with great care for your telescope, and the high quality of the optics is a decisive element of the Vātes concept. Years of experience in the manufacture of large, thin optics ensure reliably high optical quality.
A unique feature of the primary mirror mechanisms used in Vātes astrographs is the central support, which mounts the primary mirror in a non-continuous borehole exactly in the centre of gravity of the mirror inside, at specific points and without restricting the remaining degrees of freedom. The influence of this type of mounting on the glass is minimal. Interferometric evaluation of this mirror on the test bench confirms its high optical quality, with a Strehl ratio of 0.98. The primary mirror cells used in Vātes astrographs are proven partners for thin Nauris primary mirrors. The use of a sophisticated mechanism, which is unique to these telescopes, makes it possible to use thin optics for high-resolution photography and visual observation. The mechanism remains remarkably inconspicuous during night-time use – it simply works and you don't even think about it.
One of the biggest negative influences on the alignment stability of Newtonian telescopes comes from the spider. The one-sided load caused by the weight of the secondary mirror exerts a torque that causes the spider to twist. However, this can be counteracted by a counterweight matched to the secondary mirror, which creates an opposite torque effect. The negative influence was identified during the development of the mechanics and reduced to a minimum by this simple measure. The counterweight has been standard on all Vātes Astrographs ever since – the result is clean stars in the corners of the image, even after a meridian flip.
Unlike many other lattice tube designs, Nauris relies on the Serrurier design, which consists of three main components connected by optimally dimensioned (calculated for deformation) lattice tube assemblies. This minimises bending of the mechanics, resulting in sharper star images across large areas of the sky thanks to this advanced design. The main mirror cell, centre section and hat are transported separately, as are the 16 lattice tubes, which are grouped into 8 pairs and connect the three main components. The assembly can be easily carried out by one person up to D400 mm; above this, it is recommended that two people carry out the assembly. This design requires approx. 10-15 minutes to assemble.
It not only matters which telescope you buy but also where you buy it. Our additional services:
- We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
- We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.
Our expert comment:
The scope comes with a ParaCorr-II coma corrector. This works perfectly with the OTA. The focal length/aperture ratio is extended by approx. 15% when in use. Of course, any other corrections can also be used if desired.
(Jan Ströher)
