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Home Filters Solar Filters & Glasses Baader AstroSolar A4 Solar Film
Ideal for making solar filters for cameras binoculars and telescopes to view eclipses, transits and sunspots. Baader Planetarium AstroSolar film for solar observation with telescopes in an A4 20cm x 30cm sheet. It 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% (neutral density 5.0).Many telescopes have a "plug" normally around 50mm diameter on the lens cover that makes an ideal place to use the Solar film, then the original cap can be used as a solar filter holder. Dont worry if you think that is only a small aperture, the Sun is very close and large, the hole will normally provide a far cleaner view than using the entire aperture. This is especially true of obstructed designs like reflectors and SCT's where the hole then provides clear unobstructed aperture which is better for contrast.Full instructions on how to make a Solar filter are of course included.
Baader solar film in A4 size for making solar filters for cameras, binoculars or telescopes, it can be cut to size and provides a high quality image in true colour, supplied with full instructions.Baader Planetariums AstroSolarTM safety film is a specially manufactured streak- and blister free 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.Many telescopes have a "plug" normally around 50mm diameter on the lens cover that makes an ideal place to use the Solar film, then the original cap can be used as a solar filter holder. This is often found on refractors and reflectors and the 50mm or so aperture is more than enough to privide plenty of resolution and detail.A New Standard in Solar Filters (review in Sky & Telescope)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.Optical quality: This highest precision film consistently produces strehl ratios of 94 to 96 percent at interferometric tests - thus it performs optically like a Fluorite Triplet Lens by Carl Zeiss or Astro Physics Triplet. What is even more important - with AstroSolar 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 it's 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". Eye safety: AstroSolar is essentially free from pinholes, since - other than with even the most expensive glass filters - it is coated on both sides, so that the chance of two pinholes overlapping each other is extremely faint. Pinholes do appear, but to 1 out of 10000 only in optical density 2.5! Baader AstroSolar safety film has been approved for eye safety by the National Bureau of Standards in Germany, the PTB. Unlike any other Solar Filter on the market, AstroSolar is CE-tested according to EG-Norm 89/686 and EN 169/92 ( notified body 0196). All processes connected to this product have been thoroughly tested. Coatings are inspected constantly for consistency to ensure your eye safety! Supplied with instructions in single A4 size sheet and can be trimmed with scissors to fit