Sheet for sun filters, A4 210x297mm

It is extremely interesting to observe the Sun after an eclipse. The number of spots, their shapes and sizes permanently vary. Depending on the magnification, you can even observe the centimeters and margins of sunspots (umbra and penumbra). The basic condition for being able to observe the sun lies in reducing sunlight below 1/100,000 of its normal intensity, a level that is harmless to the eyes. The Astro-Solar sun filter film meets this standard. It must be mounted in the tube aperture of the telescope, and offers quality comparable in all respects to that of glass plane-parallel filters. The coating is subject to permanent quality control. The multiple metallic coating of the foil guarantees an excellent and uniform effect at the same time.

Technical characteristics:

• folio size: DIN A4 (210 x 297 mm)
• folio effect: 99.999% (ND = 5.0)
• 0.012 mm thickness of the sheet
• Absolutely bubble and streak free material (not mylar)
• Required characteristics: for telescopes, binoculars, spotting scopes and objectives with apertures up to 152 mm in diameter
• test mark: CE
• We supply a Din A4 sheet of paper with instructions in PE packaging.