My solar projector is the best on the market today bar none and there is no better way to view the sun for the coming eclipse. I have a limited number of solar projectors in stock so get yours before they sell out! See it in my yard sale or in my You Tube video: https://www.youtube.com/watch?v=pgQOsK6RdC4
Well that stinks, the 325 mm focal length lens was dropped from the available lens catalog so you can’t make the design I had posted here unless you make the lens. However there is one more 6 inch design that uses commercial lenses and hopefully they will still be available. I uses 220 and -250 mm lenses giving a little bit shorter BFL, a final F ratio of F/7.6 and a Strehl of .993.