If you are inside the path of totality, remove your solar filter only when the Moon completely covers the Sun’s bright face and it suddenly gets quite dark. Seek expert advice from an astronomer before using a solar filter with a camera, telescope, binoculars, or any other optical device note that solar filters must be attached to the front of any telescope, binoculars, camera lens, or other optics. Similarly, do not look at the Sun through a camera, telescope, binoculars, or any other optical device while using your eclipse glasses or handheld solar viewer - the concentrated solar rays could damage the filter and enter your eye(s), causing serious injury. Do not look at the uneclipsed or partially eclipsed Sun through an unfiltered camera, telescope, binoculars, or other optical devices. After looking at the Sun, turn away and remove your filter - do not remove it while looking at the Sun. Stand still and cover your eyes with your eclipse glasses or solar viewer before looking up at the bright Sun. Put your eclipse glasses on over them, or hold your handheld viewer in front of them. If you normally wear eyeglasses, keep them on. Always supervise children using solar filters. Read and follow any instructions printed on or packaged with the filter. 
Always inspect your solar filter before use if scratched, punctured, torn, or otherwise damaged, discard it.Instructions for safe use of solar filters/viewers: 7-Eleven, Best Buy, Circle K, Hobby Town, Kirklands, Kroger, Lowes, Pilot/Flying J, Toys "R" Us, and Walmart. Some (not all) locations in the following retail chains sell ISO-compliant safe eclipse glasses and/or handheld viewers in their stores, but not on their websites.
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