The Absolute Eclipse Solar Filter Sheet is a flexible solar film for safe, direct observation and photography of the Sun through optical instruments. Cut the sheet to size and mount it over the front aperture of a telescope, pair of binoculars, spotting scope or camera lens to view sunspots, planetary transits and solar eclipses — or to build your own custom solar filter at a fraction of the cost of a ready-made one.
The film is an aluminised polymer that transmits no more than 0.00023% of visible light — an optical density of at least OD 5.6 — reducing the Sun's ultraviolet, visible and infrared radiation to comfortable viewing levels and rendering a sharp, natural orange solar disc with clear sunspot detail. The filter material is independently tested by ICS Laboratories (an ISO/IEC 17025 accredited test laboratory).
Available in three square sizes — 100×100 mm, 150×150 mm and 210×210 mm — to suit anything from a camera lens to a large refractor or binoculars. Measure your instrument's aperture, trim the sheet leaving at least 10 mm of overlap on every side, and secure it over the front opening with a rigid frame, holder or tape. Position the silver reflective side towards the Sun and the black side towards the instrument.
⚠ Safety
This filter must always be the first optical element between the Sun and your instrument. Never place it behind the eyepiece or a lens, where concentrated sunlight will burn through and cause instant, permanent damage. Inspect the film before every use and do not use it if scratched, pinholed or creased. Supervise children at all times.
How to use it
Manufacturer: SIA Gravitis Enterprise Limited, Lauku iela 7-4, Cēsis, LV-4101, Latvia.
