Baader AstroSolar Safety Film A4 Material ND 5.0
Baader AstroSolar Saftey Film is made for the construction of high-quality objective-filters for observing the sun with telescopes, binoculars, camera or video-lenses. This foil is CE-tested and reduces the intensity of sunlight by 99.999%.
With AstroSolar Saftey Film the Sun appears in it’s real colour – neutral white. Other films and most glass filters produce a blurry bluish or reddish Solar image, thereby cutting part of the spectrum. Especially with an orange sun, it is very hard to see faculae regions which are visible predominantly in the blue wing of the spectrum.
Due to its neutral colour balance, AstroSolar enables the use of various colour (or interference) filters which allows the observer to concentrate on certain spectral passbands for investigations of different layers within the solar ‘atmosphere’.
Baader Planetariums AstroSolarTM safety film is a specially manufactured streak- and blisterfree foil. It attains the optical performance of planeparallel glass filters. The base material is not “Mylar”! The basic development of this film was made in laboratories for nuclear and particle physics.
High density coatings on both sides of the foil ensures a highly uniform filtering, while neutralizing the occasional miscroscopic holes in the coating. The image of the sun is extremely contrasty and of almost neutral colour.
The coating of the foil is subject to constant quality control. Its reflective property of over 99.999% has been tested by a German Republic bureau of standards and conformity with EU norm 89/686 is certified with the CE-symbol. We deliver AstroSolarTM safety film in sheets of 20×29.5 cm. For larger requirements, such as instruments with larger aperture or high-volume orders, it may be obtained in rolled sheets of 100 x 50 cm (approx. 4 Sq.Ft).Stock No: 2459281