Here we are in Feb 2008, and still have some interesting projects on the go. The design of a cheap, effective ERF ( Energy Rejection Filter) to use on the Genesis 4" telescope is #1 at the moment. Based on a UV-IR filter from ROSCO, Sydney, Australia and a #25 Red from Surplus Shed. The etalon filter has been removed from a PST and adaptors made to fit the 2" focusser.
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