Sky-Watcher Sun 150mm - solar filter holder for Newton telescopes
Solar observation is one of the most fascinating disciplines in amateur astronomy - and at the same time one where safety can never be compromised. The Sky-Watcher Sun 150mm filter holder is a practical and reliable solution for anyone who wants to safely observe the solar disk, sunspot groups, granulation or planetary transits using their Newton reflector telescope. This is a purely mechanical component without a filter, designed and constructed to accept solar filter film or other solar filtration media.
Compatibility and design
The holder is designed to fit precisely onto the tube of Sky-Watcher Newton telescopes with a 150mm aperture. It is specifically compatible with the following models:
- SW 150/750
- SW 150/1200
- OMNI 150 XLT
The central opening is dimensioned for standard solar film mounting. The most popular choice is Baader Astro Solar Film, which transmits approximately 1/100,000 of incoming light and provides both visual and photographic safety. The film is typically attached by folding it over the frame and securing it in place, so the resulting filter sits firmly and safely on the front of the telescope tube.
Why use a dedicated solar filter holder
Improvised solutions for solar observation carry real risks - a filter must sit securely, must not come loose during telescope handling, and must not allow unfiltered light to pass around its edges. The Sky-Watcher Sun 150mm holder is precisely manufactured for specific tube diameters, eliminating the uncertainty of homemade adaptations and delivering a professional result both in terms of safety and everyday usability.
For astronomers who regularly monitor solar activity - especially during periods of elevated solar maximum - this is an investment that pays for itself many times over through peace of mind and comfort at every observing session.
Filter material and safety requirements
The solar filter holder for 150mm Newton telescopes is supplied without a filter, so the choice of filtration material remains entirely with the user. In addition to Baader Astro Solar Film, other compatible films or third-party film filters can be used, provided they meet the safety standards for solar observation:
| Parameter |
Minimum requirement |
| Optical density (visual use) |
ND 5.0 or higher |
| Application |
Visual and photographic solar observation |
Ready for solar observation
If you own one of the telescopes listed above and want to observe the Sun safely and comfortably, this holder is the right foundation for your solar filtration system. Simply add a quality solar film and you are ready to observe - safely, reliably and with full confidence.
