Product Details:
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.