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Old 07-10-2017, 05:00 PM
astro1965 (Nick)
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astro1965 is offline
 
Join Date: Sep 2015
Location: melbourne
Posts: 19
1.25 inch PORRO PRISM(ERECTING PRISM)

Hi all,just after one of these old style correct image, straight through
prisms,that no longer seem to be around.I have a 45 degree one,but would like to try straight thru terrestrial observing.These were the circular thick
prisms(usually black in colour).cheers,Nick.
 

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