To: colinhester
Hydrogen-Alpha filter, or projection?
25 posted on
04/21/2009 10:41:54 AM PDT by
ArrogantBustard
(Western Civilization is Aborting, Buggering, and Contracepting itself out of existence.)
To: ArrogantBustard
Hydrogen-Alpha filter, or projection?
Neither. This was back in the gool ol' days when small refractors came with screw-in filters for the eyepiece, which gave the sun a greenish tint. Later I learned this method was a very bad idea. These types of direct-view filters were prone to cracking, exposing the eye directly magnified sunlight.
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