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New design - Annular ring OAG???
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29-04-2013, 03:11 PM
Astro_Bot
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Join Date: Jun 2012
Location: Brisbane
Posts: 1,605
Good idea, AFAICS.
With the appropriate optical treatment (barlow/reducer/corrector/extension/focussing ring/whatever), couldn't you use the entire FOV for a guide star? It looks effectively to be a reflector-like arrangement with large CO.
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