Order no. 257.ASK
With this special film it is possible to look directly at the sun with binoculars or telescope without danger for the eyes, in order to observe sunspots or an eclipse.
The tear-resistant, CE-tested film with a filter factor of over 100,000 (optical density over 5) reduces the strength of the sunlight by at least 99.999%.
Format 10 x 10 cm, best suited for all small telescopes with lens diameters up to 60 mm.
Also available in DIN A4 format Order number 233.ASF.
Filter factor of over 100,000
optical density above 5
Size 100 x 100 mm