Astrozap Baader Solar Filter. Fits 120mm-130mm dia. [AZ-1001-1]

Astrozap: Made from light, 0.040" thick aluminum, this powder-coated white solar filter cell fits telescopes with an outside diameter range of 145 mm to 155 mm and features Baader AstroSolar™ safety film for eye protection when viewing the sun. Solid threaded inserts and nylon thumbscrews guarantee secure attachment.
The Sun appears in colorless white with Baader AstroSolar™ safety film. Other films as well as some glass filters generate a blurry bluish or reddish Solar image, thereby reducing the spectrum. With an orange sun especially, it can be difficult to locate faculae regions which are detectable primarily in the blue spectral region.

AstroSolar film, due to its neutral color balance, permits the use of an assortment of color (or interference) filters to allow the viewer to focus on certain spectral passbands for inspections of distinct solar "atmosphere" layers.

AstroSolar™ is virtually pinhole-free due to it being coated on each side, making the possibility of two overlapping pinholes extremely unlikely. Some glass filters don't always have coatings on both sides, even some of the more expensive filters. Pinholes do appear, however, but in only 1 out of 10,000 and only in optical density 2.5! Germany's National Bureau of Standards, the PTB, has approved Baader AstroSolar™ film for eye safety. Contrary to other available solar filters, AstroSolar™ film is CE-tested per EG-Norm 89/686 and EN 169/92 (notified body 0196). All processes associated with this product have been tested exhaustively. Coatings are scrutinized regularly for consistency to guarantee safety for your eyes.