Sky-Watcher Solar Filter 150mm for Refractor

The Sky-Watcher Solar Filter 150mm for Refractors allows you to conduct safe solar viewing by reflecting harmful rays and reducing sunlight to a safe intensity. Utilizing premium Baader Astro Solar Safety Film, this filter transmits only 1/100,000 of visible light while reflecting 99.999% of unwanted light, including harmful ultraviolet and infrared rays. Declared safe for direct solar viewing by the German National Bureau of Standards, this durable filter attaches securely to the front of your refractor, ensuring that your eyes and equipment remain protected while you explore our closest star.

Designed to deliver the optical performance of high-quality glass filters, the double-sided metal coatings on this film ensure excellent color balance and a natural white-light view of the Sun. This clarity allows you to see intricate details such as sunspots, bright faculae near the solar limb, and the mottled textures known as granules. Viewing the Sun is a fantastic source of fun and astronomical knowledge, and this filter provides the most effective and safe way to observe one of the most amazing objects in our sky.

Product Features in Detail

Superior White Light Clarity
Unlike standard Mylar filters that can cause a distorted orange or blue tint, this Baader-film filter provides a crisp, neutral white image. This is essential for seeing the fine, honeycomb-like ""granules"" on the solar photosphere.

Professional-Grade Safety
The dual-sided metallic coating ensures that even if one side of the film experiences minor wear, the integrity of the filter remains intact. This provides a critical safety buffer when exposing your eyes to direct solar radiation.

Observing Solar Dynamics
With a 150mm refractor, you can resolve the complex structures of sunspots, including the dark ""umbra"" and the lighter ""penumbra."" You can also observe how these magnetic storms change shape over hours or days.

Prevents Thermal Damage
By reflecting 99.999% of solar energy before it enters the telescope, this filter keeps your refractor's internal air column and eyepiece cool. This prevents the heat damage that can occur if a refractor is pointed at the Sun without a front-mounted filter.

Easy and Secure Installation
The filter housing is designed to slide snugly over the telescope's dew shield. This front-mounting position is the safest method for solar observation, as it ensures the heat never enters the optical tube assembly.

Daytime Astronomy Utility
This filter doubles the usability of your telescope by making it a daytime instrument. It is an ideal tool for educational demonstrations, tracking solar cycles, or observing rare events like the transit of Mercury or solar eclipses.