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Old 31-12-2016, 03:03 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,927
Interesting...
We've been using the Vixen flip mirror body (#2680) - with similar T thread ports replacing the mirror with a 80/20 beamsplitter as a solution to slit spectroscope guiding for many years.
"Astronomical Spectroscopy for Amateurs", p220
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