Orion 4.57" ID Orion zonnefilter
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- A must-have for safely observing the sun and sunspots without damaging your eyes
- 4.57" Inside diameter optical glass filter fits snugly over your telescope's front aperture to block 99.999% of incoming sunlight for safe observation and astrophotography
- Glass filter elements are machine-polished and triple-coated with nickel-chromium stainless steel and fits telescope tube diameters up to 0.25" smaller than specified size of 4.57"
- Each Orion telescope solar filter includes three equidistant thumbscrews, 4x 1/16" thick adhesive foam tabs, and 4x 1/8" thick adhesive foam tabs for customized friction fit to your telescope