Sky-Watcher solar filter holder for 120mm refractor
Want to observe the Sun safely and comfortably with your Sky-Watcher 120mm refractor? This holder is exactly what you need as the foundation for building your own solar filter. It is a precisely made holder without a filter, but it is fully ready for immediate installation of filter film - for example the popular and well-proven Baader Astro Solar Film. The result is a reliable solution for anyone who wants to observe solar activity, sunspots, or planetary transits.
What is included and how it works
The holder is manufactured with a pre-prepared opening matching the lens diameter of the Sky-Watcher 120mm refractor, so it fits directly onto the objective without any modifications. The filter film itself is not included - the holder serves as a supporting frame into which you insert and secure your chosen filter material yourself. This concept gives you full control over the type and density of filter you use, and if the film gets damaged, you simply replace only the film, not the entire assembly.
Safety - why the filter must be placed in front of the objective
The holder is designed so that the filter film is held firmly and securely in front of the telescope objective. This is absolutely essential - a solar filter must always be placed in front of the objective, never behind it. Any other arrangement could cause serious eye injury or damage to the telescope due to concentrated heat radiation.
Compatibility
The holder is primarily intended for Sky-Watcher refractors with an objective diameter of 120mm. It is suitable for popular models such as the Sky-Watcher Evostar 120 or similar 120mm refractors from this manufacturer. If you are not sure about compatibility with your specific model, we recommend verifying the exact outer diameter of the tube in the objective area before purchasing.
Recommended filter film
The most commonly recommended filter material is Baader Astro Solar Film at astronomical density ND 5.0, which transmits approximately 1/100,000 of sunlight and provides safe and high-contrast imaging of the solar photosphere. The resulting filter allows observation of:
- Sunspots
- Solar granulation
- Other surface details of the Sun
Advantages of a DIY solar filter with this holder
A solar filter assembled by hand from quality film in a precise holder has several advantages over cheap ready-made solutions:
- Baader Astro Solar Film is among the world's absolute best in terms of image quality and safety
- The holder provides mechanically stable mounting with no risk of accidental release
- If the film is damaged or you decide to switch to a different filter type, you simply replace just the film - the holder continues to serve you
- Economical and elegant solution for astronomers who take solar observation seriously
About Sky-Watcher
Sky-Watcher is one of the world's leading manufacturers of astronomical optics, whose products are used by beginners and experienced observers around the world. The brand is known for its emphasis on build quality, optical precision, and a wide range of accessories - including accessories like this solar filter holder. Investing in genuine Sky-Watcher accessories guarantees perfect compatibility and a long service life for the entire assembly.
