Baader AstroSolarTM Safety Film
Patent pending in all European States - voted for “Astro-Product of the Decade” in the USA.
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 (Interferometric test results). Unfortunately we have a hard time ourselves to see any
difference in performance between AstroSolar TM and 1/20 wave precision optical windows which we are stocking here from Zeiss. Our stock of
precision polished plates runs into tenths of thousands of $ - all stocked in for the 1999 eclipse - but AstroSolar TM was so good in fact, that these
plates are hard to sell. Our Safety Film shows notably more sharpness and contrast than any competitive product we know of, especially including all
affordable US-Glass Objective Filters.
What is even more important - with AstroSolarTM the Sun appears in it’ s real color - 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 color balance, AstroSolar enables the use of various color (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 TM 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 TM 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 TM is CE-tested accor