Sales & Advice 01342 837 098
Shopping Basket
0 item(s) - £0.00
You have no items in your shopping cart.

0

More Views

Baader Astro Solar Film 200mm x 290mm (nearly A4) Sheet

£21.00

Quick Overview

Baader film in A4 sheets allowing you to safely view the Sun with the highest optical quality. Our Safety Film shows notably more sharpness and contrast than any competitive product we know of, especially including all affordable US-Glass Objective Filters.
2459281
Only 0 left

Availability: Out of stock

Details


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™ 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™ 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 AstroSolar™ 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™ 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!

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.