Solar filter for 90-mm aperture telescopes. With Levenhuk 90mm Solar Filter you can safely observe the Sun and you don't have to worry about your eyes - this filter will protect them from harmful solar radiation. This filter can be used with telescopes of 3.5-inch aperture. The German-made Baader Planetarium AstroSolar Visual film has a uniform structure and provides high-quality images with no distortion. It allows you to see a lot of details on the solar surface such as granulation, solar flares and the structure of the spots - all this you will be able to see with your own eyes. With this filter the Sun will be of a neutral, eye-pleasing white color.