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Originally Posted by ballaratdragons
The thinnest mirror I have ever heard of was microscopically thin.
It was a 12" diameter piece of solar film held around the entire circumfrence by a circular wooden frame, suspended 2" above the ground. A tripod was constructed to hold a 2ndry mirror and a focuser, then placed so the 2ndry and focuser were directly above the solar film.
A wind break of Garden plastic was placed around the whole lot, and then they placed a drop of water into the centre of the solar film. They kept adding water a drop at a time until the correct f ratio was achieved.
It worked!!!! But only at Zenith!
Now that's a thin mirror!!!!!!!!!!!!!!!!!!!
Good luck with your mirror David, at least you'll be able to see the rest of the sky, not just Zenith!
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Wow, thats a great story Ken, how long ago was this? Was it someone on this site?