16"+20" Dobsonian Telescope "Infinity NL": Black Edition





The nights are dark... and so are the dobsonian telescopes of the "Infinity NL" series when upgraded to the new „Black Edition“.

This version has been available since fall 2019 as an extra-charged upgrade to the standard Infinity NL (see current price list Link?) .

In contrast to the standard Infinity NL, the Black edition not only comes with matt black secondary cage rings but additionally includes this high quality finish completly for all trusses as well as the upper and lower truss holders and the braces.

The upgrade is available for all sizes of the series.


Advantages of Spacewalk Telescope´s special black finish


The advantages of the extremely matt black powder-coating used by Spacewalk Telescopes compared to conventional coating techniques is best explained with a comparison.

Let us take a look at two differently coated rings for the secondary cage. The left ring shows a conventional black coating whereas the right ring is an example of the special matt black coating.

At first glance the special coating seems a bit lighter than the conventional one but this impression is a bit misleading and created by the specific photographic setup. This setup seeks to show the actually important fact: the light hits the rings under a very small angle of incidence putting an emphasis on the reflective properties. It is obvious that the matt black coating is far less reflective than the conventional one. This means significantly less stray light within the optical system which on the one hand is extremely useful for observation of the moon, on the other hand it greatly improves observations in the vicinity of certain light sources like street lanterns next to the home garden or reflective snowy surfaces.

When choosing the optional „Black Edition“ not only the rings of the secondary cage but also the eight trusses as well as their holders and the braces are coated in elegant black and barely reflect the light.

Durability is another important point to be mentioned concerning the coating. Especially compared to anodized surfaces the powder-coating used by "Spacewalk Telescopes" is much more durable and offers robust protection against mechanical influences that otherwise might cause scratches. This doesn´t come as a surprise, after all the coating layer has around 10 times the thickness of a typical anodized layer and additionally is burned into the surface at high temperatures of up to 200°C. An additional bonus is the smooth coverage of tiny scratches that are present within the raw material leading to an exceptionally smooth, silk-matt surface.