Quote:
Originally Posted by astro1965
Thanks for the info Julian ,I think I will probably make a solar film filter to fit my 12 inch dob and check like crazy the filter for holes or tears.Hopefully I will get some good views of the sun.thanks Nick.
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Nick, the Baadar film is surprisingly tough. Normal careful handling is not a problem. Certainly check before using as others have said.
I have made three filters now for apertures up to 140mm out of good quality cardboard, tape and glue. That is all that is needed and they work well.
I would not make a 12" filter. The image will be too bright to look at comfortably. Even 8" ones are overly bright. In your case I would be making an off axis 4 to 5 inch filter. This is all the aperture you need for the Sun and will deliver an excellent, comfortable image. You will also have the advantage of no central obstruction. In any event the standard sheets would not cover 12".
Let us know how you go.
Steve