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How to Construct a Solar Projection Box


Bob Oseman

I possess a Vixen GP102 refractor, which uses the Vixen Great Polaris equatorial mount and whilst Iíd used a Baader Astrofilm filter to observe sunspots directly, this didnít enable me to produce sunspot drawings with reasonable precision. A projection box was called for, one that was robust, rigid, yet light in weight.

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Last updated 25-Apr-2018