12.13" ID Orion Full Aperture Solar Filter

Designed to fit snugly over the aperture of your telescope, these optical glass filters block 99.999% of incoming sunlight, allowing you to safely observe sunspots and solar granulation in the Suns photosphere. The Sun appears in a natural, whitish color. The glass elements are machine-polished and triple-coated with nickel-chromium stainless steel for a scratch-resistant surface. Each filter has three nylon thumbscrews to ensure a snug fit to the front of your telescope or binocular. The thumbscrews complement the press-fit foam lining inside the filters durable aluminum cell to accommodate diameters up to 1/4 smaller than the nominal size. A tight press fit is still required for safe solar viewing. Lifetime limited warranty.CAUTION: Never look at the Sun, either directly or through a telescope, without a professionally made protective solar filter installed that completely covers the front of the instrument, or permanent eye damage could result.

A must-have, white light filter for safely observing the sun and sunspots without damaging your eyes Optical glass filter fits snugly over your telescope's aperture to block 99.999% of incoming sunlight Glass elements are machine-polished and triple-coated with nickel-chromium stainless steel Filter is mounted in an aluminum cell and supplied with foam tape liner - fits Orion SkyQuest XT10, XT10i IntelliScope, XT10g GoTo Dobsonians and Atlas 10 reflector telescopes Note: All Orion solar filters are designed for use with an adequate friction fit attachment. Thumbscrews should ONLY be used to keep filter securely in place once a friction fit has been achieved