Bresser EXPLORE SCIENTIFIC 1.25 H-Beta Nebula Filter

Obstacles in Night Sky Exploration

One of the most important obstacles for the exploration of the night sky is the brightening of the night sky by artificial lights, such as streetlights. The night sky is not really dark in the vicinity of towns or cities, which reduces the visibility of objects beyond the solar system enormously.

Enhancing Visibility

Depending on the type of celestial object, it is possible to increase the contrast dramatically by blocking the annoying artificial light. The Explore Scientific H-beta filter uses a characteristic property of the so-called emission nebulae.

Emission Nebulae

These objects glow in special colors, known as emission lines. These emission lines are linked to chemical elements - in this case, hydrogen. The Explore Scientific H-beta nebula filter blocks all other colors (and thereby nearly all of the artificial light) and only the emission line of hydrogen can pass through the filter.

Astonishing Results

The result is astonishing; suddenly, nebulae are visible at locations that were completely empty without filters. In suburban skies, for example, the Horsehead Nebula is almost not visible with a 300mm telescope. By using this filter, you can see the nebula and its structures without problems.

A Must for Every Visual Observer

The Explore Scientific nebula filters come with an individual test certificate - your guarantee to receive a premium filter.