{"id":28060,"date":"2025-09-08T07:00:00","date_gmt":"2025-09-08T05:00:00","guid":{"rendered":"https:\/\/www.telescoop.nl\/?p=28060"},"modified":"2025-11-27T19:23:16","modified_gmt":"2025-11-27T18:23:16","slug":"solar-filter-telescope","status":"publish","type":"post","link":"https:\/\/staging.telescoop.nl\/en\/zonnefilter-telescoop\/","title":{"rendered":"Solar filter telescope: everything you need to know for safe solar viewing"},"content":{"rendered":"
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A solar filter telescope<\/strong> is indispensable if you want to observe the sun safely. After all, without a good solar filter, it is life-threatening to view the sun directly through a telescope: your eyes can suffer permanent damage within fractions of a second. In this article you will read what a solar filter is, how to use it safely, what types exist and which choice is best suited for your telescope.<\/p>\n\n\n\n

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The Omegon Solar filter<\/a> (available here)<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

What does a solar filter do for your telescope?<\/h2>\n\n\n\n

A solar filter telescope is a specially designed filter placed in front of the opening of the telescope. Its purpose is to reduce the sun's light intensity to a safe level, usually by a factor of 100,000. This allows you to see solar phenomena such as sunspots, granulation and sometimes even prominences, without risk to your eyes or your instrument.<\/p>\n\n\n\n

Important: cheap \u201csun caps\u201d or plastic caps that sometimes come with toy telescopes are downright dangerous. These can crack from heat and damage your eyes beyond repair.<\/p>\n\n\n\n

How to use a solar filter telescope safely?<\/h2>\n\n\n\n

The golden rule is that the filter should always be placed in front of the opening of the telescope. Never at the back near the eyepiece. When you mount a solar filter correctly, it ensures that only a highly attenuated and filtered image of the sun comes in.<\/p>\n\n\n\n

Some tips:<\/p>\n\n\n\n