Materials used:
1. Discarded hard sponge from Micron (recycled material)
2. Daler cardboard 12cm x 12cm (2 pcs)
Procedure:
1. Trace the cover of the OTA on the sponge.
2. USe penknife to cut a circle on the sponge.
3. Draw a 70mm diameter circle on cardboard.
4. Cut the circle out.
5. Cut a suitable size of solar film and sandwich it using the 2 pcs of cardboard and double sided tape.
6. Stick the cardboard with solar film onto the sponge.
7. The solar filter for 80FD can now be used.
Cost: ~$15
Cheers!
Baader solar filter on 80FD
Baader solar filter on 80FD
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Wee Nghee the Pooh