NOTE: All Explore Scientific Solar Equipment is rated ISO12312–2 supplied by Thousand Oaks Optical and Approved for Direct Observation of the Sun 7″-12″ diameter filter will NOT fit on 10 and 12-inch truss tube Dobsonian telescopes. Cassiopeia Observatory Review – Click Here Features ISO 12312–2 Rated; 100% Safe for Eclipse Viewing Lightweight and generally does […]