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G'day Chris
Hope you get to the eclipse, they're one of the awesome spectacles in nature. For solar filters I would recommend purchasing an A4 sheet of Baader Astrosolar Safety Film , about $50, from any online retailer that stocks the film, such as Aquila Optical & Electronics.com.au or Telescopes & Astronomy.com.au. Some of the major retailers may stock the same or similar material,and the Baader film has a comprehensive instruction sheet included explaining how to make simple filter mounts for telescopes or cameras.
I've made several filters for my scopes from 1 sheet and they work just fine.
Regards
Jeff
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