Thread: Convert a plastic shed into a ROR
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Old 19-05-2022, 06:54 PM
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pmrid (Peter)
Ageing badly.

pmrid is offline 		 
Join Date: May 2008
Location: Cloudy, light-polluted Bribie Is.
Posts: 3,679
OK! Finally got a good balance between total length of rig and the internal dia of the obs. The answer was I bought a SharpStar 94EDPH f5.5 triplet with a custom flattener/0.82Reducer that screws into the drawtube making it effectively a quatro (Petzval-like) system at f4.4. Good aperture, fast optics and very well corrected to 44mm image diameter and free of CA.

And so the forecast just went from bad to worse.
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Last edited by pmrid; 20-05-2022 at 09:25 AM.
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