Light absorbing paint Unwanted reflections inside a telescope or an accessory are a nuisance for visual observers as well as for astro imagers. The standard factory coatings of inner tube walls, eyepiece barrels, focuser tubes etc. often leave much to be desired. This is especially true for Newtonians, which are particularly susceptible to stray light entering the system. Some observers try to cure their instruments with either blackboard paint or felt lining. Both solutions have their drawbacks, as even matt- black blackboard paint still reflects a lot of light and felt tends to release lint which soils the optics. A better solution is the special light absorbing paint (Antireflexfarbe) produced and distributed by Astrogeraete Berger in Germany. The comparison below demonstrates how well the paint works. These are two images of the same focuser tube of a 110/440mm Skywatcher Newtonian against a bright light source. The left picture shows how much light is reflected by the inside of the barrel having the standard factory coating. The right picture shows the same barrel after its inside was painted twice with the special anti-reflection coating from Astrogeraete Berger. Both images were shot under identical conditions.
Focuser Barrel with Special Light Absorbing Coating
This is a mobile preview of our extensive website. On our large-screen desktop version you will find a ton of more astronomical images, stories, reviews etc. Here are some of our most popular stories for download:
The quest for the gegenschein (PDF)
360 degree astrophotography (PDF)
Review of the Omegon Mini Track (PDF)
DSLR astrophotography untracked (PDF)
Planetary filters for small telescopes (PDF)
AstroTrac imaging tips (PDF)
Photographic map Virgo Cluster (PDF)
Stargazing sites on La Palma island (PDF)
Position angle scales for eyepieces (PDF)
Grossmugl Star Walk installation (PDF)
Limiting Magnitude Charts (PDF)
Webcam imaging small telescopes (PDF)
Visit the desktop version of our website - you will find a ton of more astronomical images, stories and reviews.
project nightflight - Verein zur Darstellung und Erhaltung der Schönheit des Sternenhimmels ZVR: 233729623 Hellwagstraße 14/2 Top 12 1200 Vienna, Austria, Europe Email: